diff --git a/compiler/driver.ml b/compiler/driver.ml
index 472c532f..9206449f 100644
--- a/compiler/driver.ml
+++ b/compiler/driver.ml
@@ -26,7 +26,8 @@ let modname_of_file f =
   (* Fixme: make this more robust *)
   String.capitalize_ascii Filename.(basename (remove_extension f))
 
-let get_lang options filename =
+let get_lang options file =
+  let filename = match file with Cli.FileName s -> s | Contents _ -> "-" in
   Option.bind
     (List.assoc_opt (Filename.extension filename) extensions)
     (fun l -> List.assoc_opt l Cli.languages)
@@ -44,7 +45,7 @@ let get_lang options filename =
 let load_module_interfaces prg options link_modules =
   List.fold_left
     (fun prg f ->
-      let lang = get_lang options f in
+      let lang = get_lang options (FileName f) in
       let modname = modname_of_file f in
       Surface.Parser_driver.add_interface (FileName f) lang [modname] prg)
     prg link_modules
@@ -55,10 +56,7 @@ module Passes = struct
 
   let surface options : Surface.Ast.program * Cli.backend_lang =
     Message.emit_debug "Reading files...";
-    let language =
-      get_lang options
-        (match options.input_file with FileName s -> s | Contents _ -> "")
-    in
+    let language = get_lang options options.input_file in
     let prg =
       Surface.Parser_driver.parse_top_level_file options.input_file language
     in
@@ -555,7 +553,7 @@ module Commands = struct
     List.iter
       (fun ((var, _), result) ->
         Message.emit_result "@[<hov 2>%s@ =@ %a@]" var
-          (Print.expr ~debug:options.Cli.debug ())
+          (Print.UserFacing.value (get_lang options options.input_file))
           result)
       results
 
diff --git a/compiler/shared_ast/print.ml b/compiler/shared_ast/print.ml
index d6b27b78..e9532cf1 100644
--- a/compiler/shared_ast/print.ml
+++ b/compiler/shared_ast/print.ml
@@ -873,3 +873,167 @@ let rec code_item_list ?(debug = false) decl_ctx fmt c =
 let program ?(debug = false) fmt p =
   decl_ctx ~debug p.decl_ctx fmt p.decl_ctx;
   code_item_list ~debug p.decl_ctx fmt p.code_items
+
+(* - User-facing value printer - *)
+
+module UserFacing = struct
+  (* Refs:
+     https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Dates_and_numbers#Grouping_of_digits
+     https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:Conventions_concernant_les_nombres#Pour_un_comptage_ou_une_mesure *)
+  let bigsep (lang : Cli.backend_lang) =
+    match lang with En -> ",", 3 | Fr -> " ", 3 | Pl -> ",", 3
+
+  let decsep (lang : Cli.backend_lang) =
+    match lang with En -> "." | Fr -> "," | Pl -> "."
+
+  let unit (_lang : Cli.backend_lang) ppf () = Format.pp_print_string ppf "()"
+
+  let bool (lang : Cli.backend_lang) ppf b =
+    let s =
+      match lang, b with
+      | En, true -> "true"
+      | En, false -> "false"
+      | Fr, true -> "vrai"
+      | Fr, false -> "faux"
+      | Pl, true -> "prawda"
+      | Pl, false -> "falsz"
+    in
+    Format.pp_print_string ppf s
+
+  let integer (lang : Cli.backend_lang) ppf n =
+    let sep, nsep = bigsep lang in
+    let nsep = Z.pow (Z.of_int 10) nsep in
+    if Z.sign n < 0 then Format.pp_print_char ppf '-';
+    let rec aux n =
+      let a, b = Z.div_rem n nsep in
+      if Z.equal a Z.zero then Z.pp_print ppf b
+      else (
+        aux a;
+        Format.fprintf ppf "%s%03d" sep (Z.to_int b))
+    in
+    aux (Z.abs n)
+
+  let money (lang : Cli.backend_lang) ppf n =
+    (match lang with En -> Format.pp_print_string ppf "$" | Fr | Pl -> ());
+    let units, cents = Z.div_rem n (Z.of_int 100) in
+    integer lang ppf units;
+    Format.pp_print_string ppf (decsep lang);
+    Format.fprintf ppf "%02d" (Z.to_int (Z.abs cents));
+    match lang with
+    | En -> ()
+    | Fr -> Format.pp_print_string ppf " €"
+    | Pl -> Format.pp_print_string ppf " PLN"
+
+  let decimal (lang : Cli.backend_lang) ppf r =
+    let den = Q.den r in
+    let int_part, rem = Z.div_rem (Q.num r) den in
+    let rem = Z.abs rem in
+    (* Printing the integer part *)
+    integer lang ppf int_part;
+    (* Printing the decimals *)
+    let bigsep, nsep = bigsep lang in
+    let rec aux ndigit rem_digits rem =
+      let n, rem = Z.div_rem (Z.mul rem (Z.of_int 10)) den in
+      let rem_digits, stop =
+        match rem_digits with
+        | None ->
+          if Z.equal n Z.zero then None, false
+          else
+            let r = Cli.globals.max_prec_digits in
+            Some (r - 1), r <= 1
+        | Some r -> Some (r - 1), r <= 1
+      in
+      if ndigit mod nsep = 0 then
+        Format.pp_print_string ppf (if ndigit = 0 then decsep lang else bigsep);
+      Format.pp_print_int ppf (Z.to_int n);
+      if Z.gt rem Z.zero then
+        if stop then Format.pp_print_as ppf 1 "…"
+        else aux (ndigit + 1) rem_digits rem
+    in
+    let rec ndigits n =
+      if Z.equal n Z.zero then 0 else 1 + ndigits (Z.div n (Z.of_int 10))
+    in
+    aux 0
+      (if Z.equal int_part Z.zero then None else Some (Cli.globals.max_prec_digits - ndigits int_part))
+      rem
+  (* It would be nice to print ratios as % but that's impossible to guess.
+     Trying would lead to inconsistencies where some comparable numbers are in %
+     and some others not, adding confusion. *)
+
+  let date (lang : Cli.backend_lang) ppf d =
+    let y, m, d = Dates_calc.Dates.date_to_ymd d in
+    match lang with
+    | En | Pl -> Format.fprintf ppf "%04d-%02d-%02d" y m d
+    | Fr -> Format.fprintf ppf "%02d/%02d/%04d" d m y
+
+  let duration (lang : Cli.backend_lang) ppf dr =
+    let y, m, d = Dates_calc.Dates.period_to_ymds dr in
+    let rec filter0 = function
+      | (0, _) :: (_ :: _ as r) -> filter0 r
+      | x :: r -> x :: List.filter (fun (n, _) -> n <> 0) r
+      | [] -> []
+    in
+    let splur n s = if abs n > 1 then n, s ^ "s" else n, s in
+    Format.pp_print_char ppf '[';
+    (match lang with
+    | En -> [splur y "year"; splur m "month"; splur d "day"]
+    | Fr -> [splur y "an"; m, "mois"; splur d "jour"]
+    | Pl -> [y, "rok"; m, "miesiac"; d, "dzien"])
+    |> filter0
+    |> Format.pp_print_list
+         ~pp_sep:(fun ppf () -> Format.pp_print_string ppf ", ")
+         (fun ppf (n, s) -> Format.fprintf ppf "%d %s" n s)
+         ppf;
+    Format.pp_print_char ppf ']'
+
+  let lit_raw (lang : Cli.backend_lang) ppf lit : unit =
+    match lit with
+    | LUnit -> unit lang ppf ()
+    | LBool b -> bool lang ppf b
+    | LInt i -> integer lang ppf i
+    | LRat r -> decimal lang ppf r
+    | LMoney e -> money lang ppf e
+    | LDate d -> date lang ppf d
+    | LDuration dr -> duration lang ppf dr
+
+  let lit_to_string (lang : Cli.backend_lang) lit =
+    let buf = Buffer.create 32 in
+    let ppf = Format.formatter_of_buffer buf in
+    lit_raw lang ppf lit;
+    Format.pp_print_flush ppf ();
+    Buffer.contents buf
+
+  let lit (lang : Cli.backend_lang) ppf lit : unit =
+    with_color (lit_raw lang) Ocolor_types.yellow ppf lit
+
+  let rec value :
+      type a b.
+      Cli.backend_lang ->
+      Format.formatter ->
+      ((a, b) dcalc_lcalc, _) gexpr ->
+      unit =
+   fun lang ppf e ->
+    match Mark.remove e with
+    | ELit l -> lit lang ppf l
+    | EArray l | ETuple l ->
+      Format.fprintf ppf "@[<hov 1>[@;<0 1>%a@;<0 -1>]@]"
+        (Format.pp_print_list
+           ~pp_sep:(fun ppf () -> Format.fprintf ppf ";@ ")
+           (value lang))
+        l
+    | EStruct { name; fields } ->
+      Format.fprintf ppf "@[<hv 2>%a {@ %a@;<1 -2>}@]" StructName.format_t name
+        (Format.pp_print_list ~pp_sep:Format.pp_print_space (fun ppf (fld, e) ->
+             Format.fprintf ppf "-- %a: %a" StructField.format_t fld
+               (value lang) e))
+        (StructField.Map.bindings fields)
+    | EInj { name = _; cons; e } ->
+      Format.fprintf ppf "%a %a" EnumConstructor.format_t cons (value lang) e
+    | EEmptyError -> Format.pp_print_string ppf "ø"
+    | EAbs _ -> Format.pp_print_string ppf "<function>"
+    | EExternal _ -> Format.pp_print_string ppf "<external>"
+    | EApp _ | EOp _ | EVar _ | EIfThenElse _ | EMatch _ | ETupleAccess _
+    | EStructAccess _ | EAssert _ | EDefault _ | EErrorOnEmpty _ | ERaise _
+    | ECatch _ | ELocation _ ->
+      invalid_arg "UserPrint.value: not a value"
+end
diff --git a/compiler/shared_ast/print.mli b/compiler/shared_ast/print.mli
index ba5423fd..3ba5e59f 100644
--- a/compiler/shared_ast/print.mli
+++ b/compiler/shared_ast/print.mli
@@ -73,3 +73,28 @@ val scope :
   unit
 
 val program : ?debug:bool -> Format.formatter -> ('a, 'm) gexpr program -> unit
+
+(** User-facing, localised printer *)
+module UserFacing : sig
+  val unit : Cli.backend_lang -> Format.formatter -> Runtime.unit -> unit
+  val bool : Cli.backend_lang -> Format.formatter -> Runtime.bool -> unit
+  val integer : Cli.backend_lang -> Format.formatter -> Runtime.integer -> unit
+  val decimal : Cli.backend_lang -> Format.formatter -> Runtime.decimal -> unit
+  val money : Cli.backend_lang -> Format.formatter -> Runtime.money -> unit
+  val date : Cli.backend_lang -> Format.formatter -> Runtime.date -> unit
+
+  val duration :
+    Cli.backend_lang -> Format.formatter -> Runtime.duration -> unit
+
+  val lit : Cli.backend_lang -> Format.formatter -> lit -> unit
+  val lit_to_string : Cli.backend_lang -> lit -> string
+
+  val value :
+    Cli.backend_lang ->
+    Format.formatter ->
+    ((_, _) dcalc_lcalc, _) gexpr ->
+    unit
+  (** @raise Invalid_argument
+        if the supplied expression is a custom/external or anything that is not
+        a value *)
+end
diff --git a/examples/aides_logement/tests/tests_calcul_al_accession_propriete.catala_fr b/examples/aides_logement/tests/tests_calcul_al_accession_propriete.catala_fr
index e7720f35..94e5a0ad 100644
--- a/examples/aides_logement/tests/tests_calcul_al_accession_propriete.catala_fr
+++ b/examples/aides_logement/tests/tests_calcul_al_accession_propriete.catala_fr
@@ -75,24 +75,24 @@ champ d'application Exemple2:
 ```catala-test-inline
 $ catala Interpret -s Exemple1
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤96.48
+[RESULT] montant = 96,48 €
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤96.48
+[RESULT] montant = ESome 96,48 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple2
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤85.00
+[RESULT] montant = 85,00 €
 ```
 
 ```catala-test-inline
 $ catala Interpret_lcalc -s Exemple2 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤85.00
+[RESULT] montant = ESome 85,00 €
 ```
 
diff --git a/examples/aides_logement/tests/tests_calcul_al_locatif.catala_fr b/examples/aides_logement/tests/tests_calcul_al_locatif.catala_fr
index fcc8f4eb..e9083575 100644
--- a/examples/aides_logement/tests/tests_calcul_al_locatif.catala_fr
+++ b/examples/aides_logement/tests/tests_calcul_al_locatif.catala_fr
@@ -128,47 +128,47 @@ champ d'application Exemple4 :
 ```catala-test-inline
 $ catala Interpret -s Exemple1 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤345.73
+[RESULT] montant = 345,73 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple2 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤352.77
+[RESULT] montant = 352,77 €
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤345.73
+[RESULT] montant = ESome 345,73 €
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple2 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤352.77
+[RESULT] montant = ESome 352,77 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple3 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤339.70
+[RESULT] montant = 339,70 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple4 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤230.63
+[RESULT] montant = 230,63 €
 ```
 
 ```catala-test-inline
 $ catala Interpret_lcalc -s Exemple3 --disable_warnings --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤339.70
+[RESULT] montant = ESome 339,70 €
 ```
 
 ```catala-test-inline
 $ catala Interpret_lcalc -s Exemple4 --disable_warnings --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤230.63
+[RESULT] montant = ESome 230,63 €
 ```
diff --git a/examples/aides_logement/tests/tests_calcul_al_logement_foyer.catala_fr b/examples/aides_logement/tests/tests_calcul_al_logement_foyer.catala_fr
index cdf28005..0321bed9 100644
--- a/examples/aides_logement/tests/tests_calcul_al_logement_foyer.catala_fr
+++ b/examples/aides_logement/tests/tests_calcul_al_logement_foyer.catala_fr
@@ -34,10 +34,10 @@ champ d'application CasTest1:
 ```catala-test-inline
 $ catala Interpret -s CasTest1 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤76.38
+[RESULT] montant = 76,38 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s CasTest1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤76.38
+[RESULT] montant = ESome 76,38 €
 ```
diff --git a/examples/aides_logement/tests/tests_calcul_apl_accession_propriete.catala_fr b/examples/aides_logement/tests/tests_calcul_apl_accession_propriete.catala_fr
index 3cb72c07..534ccd57 100644
--- a/examples/aides_logement/tests/tests_calcul_apl_accession_propriete.catala_fr
+++ b/examples/aides_logement/tests/tests_calcul_apl_accession_propriete.catala_fr
@@ -150,44 +150,44 @@ champ d'application Exemple4:
 ```catala-test-inline
 $ catala Interpret -s Exemple1 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤181.91
+[RESULT] montant = 181,91 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple2 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤67.34
+[RESULT] montant = 67,34 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple3 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤181.91
+[RESULT] montant = 181,91 €
 ```
 
 
 ```catala-test-inline
 $ catala Interpret -s Exemple4 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤118.59
+[RESULT] montant = 118,59 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤181.91
+[RESULT] montant = ESome 181,91 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple2 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤67.34
+[RESULT] montant = ESome 67,34 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple3 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤181.91
+[RESULT] montant = ESome 181,91 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple4 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤118.59
+[RESULT] montant = ESome 118,59 €
 ```
diff --git a/examples/aides_logement/tests/tests_calcul_apl_locatif.catala_fr b/examples/aides_logement/tests/tests_calcul_apl_locatif.catala_fr
index f800088b..a5271e05 100644
--- a/examples/aides_logement/tests/tests_calcul_apl_locatif.catala_fr
+++ b/examples/aides_logement/tests/tests_calcul_apl_locatif.catala_fr
@@ -281,98 +281,98 @@ champ d'application Exemple9:
 ```catala-test-inline
 $ catala Interpret -s Exemple1 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤0.00
+[RESULT] montant = 0,00 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple2 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤352.77
+[RESULT] montant = 352,77 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple3 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤321.61
+[RESULT] montant = 321,61 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple4 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤0.00
+[RESULT] montant = 0,00 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple5 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤311.56
+[RESULT] montant = 311,56 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple6 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤0.00
+[RESULT] montant = 0,00 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple7 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤153.77
+[RESULT] montant = 153,77 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple8 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤11.06
+[RESULT] montant = 11,06 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple9 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤210.06
+[RESULT] montant = 210,06 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤0.00
+[RESULT] montant = ESome 0,00 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple2 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤352.77
+[RESULT] montant = ESome 352,77 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple3 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤321.61
+[RESULT] montant = ESome 321,61 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple4 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤0.00
+[RESULT] montant = ESome 0,00 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple5 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤311.56
+[RESULT] montant = ESome 311,56 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple6 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤0.00
+[RESULT] montant = ESome 0,00 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple7 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤153.77
+[RESULT] montant = ESome 153,77 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple8 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤11.06
+[RESULT] montant = ESome 11,06 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple9 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤210.06
+[RESULT] montant = ESome 210,06 €
 ```
diff --git a/examples/aides_logement/tests/tests_calcul_apl_logement_foyer.catala_fr b/examples/aides_logement/tests/tests_calcul_apl_logement_foyer.catala_fr
index 880f27fe..77b9a053 100644
--- a/examples/aides_logement/tests/tests_calcul_apl_logement_foyer.catala_fr
+++ b/examples/aides_logement/tests/tests_calcul_apl_logement_foyer.catala_fr
@@ -139,54 +139,54 @@ champ d'application CasTest5:
 ```catala-test-inline
 $ catala Interpret -s CasTest1 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤12.06
+[RESULT] montant = 12,06 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s CasTest2 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤23.12
+[RESULT] montant = 23,12 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s CasTest3 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤154.78
+[RESULT] montant = 154,78 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s CasTest4 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤154.78
+[RESULT] montant = 154,78 €
 ```
 
 ```catala-test-inline
 $ catala Interpret -s CasTest5 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] montant = ¤129.65
+[RESULT] montant = 129,65 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s CasTest1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤12.06
+[RESULT] montant = ESome 12,06 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s CasTest2 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤23.12
+[RESULT] montant = ESome 23,12 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s CasTest3 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤154.78
+[RESULT] montant = ESome 154,78 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s CasTest4 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤154.78
+[RESULT] montant = ESome 154,78 €
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s CasTest5 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant = ESome ¤129.65
+[RESULT] montant = ESome 129,65 €
 ```
diff --git a/examples/aides_logement/tests/tests_calculette_globale.catala_fr b/examples/aides_logement/tests/tests_calculette_globale.catala_fr
index a6b6c171..e2c9d50a 100644
--- a/examples/aides_logement/tests/tests_calculette_globale.catala_fr
+++ b/examples/aides_logement/tests/tests_calculette_globale.catala_fr
@@ -158,40 +158,40 @@ champ d'application Exemple2 :
 ```catala-test-inline
 $ catala Interpret -s Exemple1
 [RESULT] Computation successful! Results:
-[RESULT] montant_versé = ¤246.23
-[RESULT] éligibilité = true
+[RESULT] montant_versé = 246,23 €
+[RESULT] éligibilité = vrai
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant_versé = ESome ¤246.23
-[RESULT] éligibilité = ESome true
+[RESULT] montant_versé = ESome 246,23 €
+[RESULT] éligibilité = ESome vrai
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple1 --avoid_exceptions -O --closure_conversion
 [RESULT] Computation successful! Results:
-[RESULT] montant_versé = ESome ¤246.23
-[RESULT] éligibilité = ESome true
+[RESULT] montant_versé = ESome 246,23 €
+[RESULT] éligibilité = ESome vrai
 ```
 
 ```catala-test-inline
 $ catala Interpret -s Exemple2
 [RESULT] Computation successful! Results:
-[RESULT] montant_versé = ¤230.63
-[RESULT] éligibilité = true
+[RESULT] montant_versé = 230,63 €
+[RESULT] éligibilité = vrai
 ```
 
 ```catala-test-inline
 $ catala Interpret_lcalc -s Exemple2 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] montant_versé = ESome ¤230.63
-[RESULT] éligibilité = ESome true
+[RESULT] montant_versé = ESome 230,63 €
+[RESULT] éligibilité = ESome vrai
 ```
 
 ```catala-test-inline
 $ catala Interpret_lcalc -s Exemple2 -O --avoid_exceptions --closure_conversion
 [RESULT] Computation successful! Results:
-[RESULT] montant_versé = ESome ¤230.63
-[RESULT] éligibilité = ESome true
+[RESULT] montant_versé = ESome 230,63 €
+[RESULT] éligibilité = ESome vrai
 ```
diff --git a/examples/aides_logement/tests/tests_eligibilite_apl.catala_fr b/examples/aides_logement/tests/tests_eligibilite_apl.catala_fr
index 7499fd6b..d06ad11b 100644
--- a/examples/aides_logement/tests/tests_eligibilite_apl.catala_fr
+++ b/examples/aides_logement/tests/tests_eligibilite_apl.catala_fr
@@ -215,13 +215,13 @@ champ d'application Exemple3 :
 ```catala-test-inline
 $ catala Interpret -s Exemple1 --disable_warnings
 [RESULT] Computation successful! Results:
-[RESULT] éligible = true
+[RESULT] éligible = vrai
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Exemple1 --avoid_exceptions
 [RESULT] Computation successful! Results:
-[RESULT] éligible = ESome true
+[RESULT] éligible = ESome vrai
 ```
 
 
diff --git a/runtimes/ocaml/runtime.ml b/runtimes/ocaml/runtime.ml
index df8698ff..32875286 100644
--- a/runtimes/ocaml/runtime.ml
+++ b/runtimes/ocaml/runtime.ml
@@ -14,6 +14,9 @@
    License for the specific language governing permissions and limitations under
    the License. *)
 
+type nonrec unit = unit
+type nonrec bool = bool
+
 (* An integer number of cents *)
 type money = Z.t
 type integer = Z.t
diff --git a/runtimes/ocaml/runtime.mli b/runtimes/ocaml/runtime.mli
index 7acb564b..9d2f4a90 100644
--- a/runtimes/ocaml/runtime.mli
+++ b/runtimes/ocaml/runtime.mli
@@ -19,11 +19,13 @@
 
 (** {1 Types} *)
 
-type money
-type integer
-type decimal
-type date
-type duration
+type nonrec unit = unit
+type nonrec bool = bool
+type money = Z.t (** Number of cents *)
+type integer = Z.t
+type decimal = Q.t
+type date = Dates_calc.Dates.date
+type duration = Dates_calc.Dates.period
 type date_rounding = Dates_calc.Dates.date_rounding
 
 type source_position = {
diff --git a/tests/test_arithmetic/good/priorities.catala_en b/tests/test_arithmetic/good/priorities.catala_en
index 7f707da5..b3789f19 100644
--- a/tests/test_arithmetic/good/priorities.catala_en
+++ b/tests/test_arithmetic/good/priorities.catala_en
@@ -18,7 +18,7 @@ $ catala Interpret -s A
 [RESULT] w = 0
 [RESULT] x = 4
 [RESULT] y = 4
-[RESULT] z = 390.
+[RESULT] z = 390.0
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
@@ -26,5 +26,5 @@ $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] w = ESome 0
 [RESULT] x = ESome 4
 [RESULT] y = ESome 4
-[RESULT] z = ESome 390.
+[RESULT] z = ESome 390.0
 ```
diff --git a/tests/test_array/good/aggregation.catala_en b/tests/test_array/good/aggregation.catala_en
index ba20c929..b0dd1078 100644
--- a/tests/test_array/good/aggregation.catala_en
+++ b/tests/test_array/good/aggregation.catala_en
@@ -26,27 +26,27 @@ scope B:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = [ ¤0.00; ¤9.00; ¤5.20 ]
+[RESULT] x = [$0.00; $9.00; $5.20]
 ```
 
 ```catala-test-inline
 $ catala Interpret -s B
 [RESULT] Computation successful! Results:
-[RESULT] max = ¤18.00
-[RESULT] min = ¤5.00
-[RESULT] y = ¤17.20
+[RESULT] max = $18.00
+[RESULT] min = $5.00
+[RESULT] y = $17.20
 [RESULT] z = 1
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome [ ESome ¤0.00; ESome ¤9.00; ESome ¤5.20 ]
+[RESULT] x = ESome [ESome $0.00; ESome $9.00; ESome $5.20]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] max = ESome ¤18.00
-[RESULT] min = ESome ¤5.00
-[RESULT] y = ESome ¤17.20
+[RESULT] max = ESome $18.00
+[RESULT] min = ESome $5.00
+[RESULT] y = ESome $17.20
 [RESULT] z = ESome 1
 ```
diff --git a/tests/test_array/good/aggregation_2.catala_en b/tests/test_array/good/aggregation_2.catala_en
index 69eccc95..32e71877 100644
--- a/tests/test_array/good/aggregation_2.catala_en
+++ b/tests/test_array/good/aggregation_2.catala_en
@@ -34,30 +34,28 @@ $ catala Interpret -s A
 [RESULT] Computation successful! Results:
 [RESULT]
 x =
-  [ { S id = 0; income = ¤0.00; };
-    { S id = 1; income = ¤9.00; };
-    { S id = 2; income = ¤5.20; } ]
+  [S { -- id: 0 -- income: $0.00 }; S { -- id: 1 -- income: $9.00 };
+   S { -- id: 2 -- income: $5.20 }]
 ```
 
 ```catala-test-inline
 $ catala Interpret -s B
 [RESULT] Computation successful! Results:
-[RESULT] argmax = { S id = 1; income = ¤9.00; }
-[RESULT] argmin = { S id = 0; income = ¤0.00; }
+[RESULT] argmax = S { -- id: 1 -- income: $9.00 }
+[RESULT] argmin = S { -- id: 0 -- income: $0.00 }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT]
 x =
-  ESome
-    [ ESome { S id = ESome 0; income = ESome ¤0.00; };
-      ESome { S id = ESome 1; income = ESome ¤9.00; };
-      ESome { S id = ESome 2; income = ESome ¤5.20; } ]
+  ESome [ESome S { -- id: ESome 0 -- income: ESome $0.00 };
+         ESome S { -- id: ESome 1 -- income: ESome $9.00 };
+         ESome S { -- id: ESome 2 -- income: ESome $5.20 }]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] argmax = ESome { S id = ESome 1; income = ESome ¤9.00; }
-[RESULT] argmin = ESome { S id = ESome 0; income = ESome ¤0.00; }
+[RESULT] argmax = ESome S { -- id: ESome 1 -- income: ESome $9.00 }
+[RESULT] argmin = ESome S { -- id: ESome 0 -- income: ESome $0.00 }
 ```
diff --git a/tests/test_array/good/concatenation.catala_en b/tests/test_array/good/concatenation.catala_en
index 6568f705..dd4e7063 100644
--- a/tests/test_array/good/concatenation.catala_en
+++ b/tests/test_array/good/concatenation.catala_en
@@ -13,26 +13,16 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = [ 0; 1; 2; 3; 4; 5; 6 ]
-[RESULT] y = [ 0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10 ]
+[RESULT] x = [0; 1; 2; 3; 4; 5; 6]
+[RESULT] y = [0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT]
-x = ESome [ ESome 0; ESome 1; ESome 2; ESome 3; ESome 4; ESome 5; ESome 6 ]
+x = ESome [ESome 0; ESome 1; ESome 2; ESome 3; ESome 4; ESome 5; ESome 6]
 [RESULT]
 y =
-  ESome
-    [ ESome 0;
-      ESome 1;
-      ESome 2;
-      ESome 3;
-      ESome 4;
-      ESome 5;
-      ESome 6;
-      ESome 7;
-      ESome 8;
-      ESome 9;
-      ESome 10 ]
+  ESome [ESome 0; ESome 1; ESome 2; ESome 3; ESome 4; ESome 5; ESome 6;
+         ESome 7; ESome 8; ESome 9; ESome 10]
 ```
diff --git a/tests/test_array/good/filter.catala_en b/tests/test_array/good/filter.catala_en
index 819eef67..1f6e5b88 100644
--- a/tests/test_array/good/filter.catala_en
+++ b/tests/test_array/good/filter.catala_en
@@ -19,13 +19,13 @@ scope B:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = [ ¤0.00; ¤9.00; ¤5.20 ]
+[RESULT] x = [$0.00; $9.00; $5.20]
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome [ ESome ¤0.00; ESome ¤9.00; ESome ¤5.20 ]
+[RESULT] x = ESome [ESome $0.00; ESome $9.00; ESome $5.20]
 ```
 
 
@@ -33,11 +33,11 @@ $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 ```catala-test-inline
 $ catala Interpret -s B
 [RESULT] Computation successful! Results:
-[RESULT] y = [ ¤9.00; ¤5.20 ]
+[RESULT] y = [$9.00; $5.20]
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] y = ESome [ ESome ¤9.00; ESome ¤5.20 ]
+[RESULT] y = ESome [ESome $9.00; ESome $5.20]
 ```
diff --git a/tests/test_array/good/filter_map.catala_en b/tests/test_array/good/filter_map.catala_en
index 5902e127..ab07ef57 100644
--- a/tests/test_array/good/filter_map.catala_en
+++ b/tests/test_array/good/filter_map.catala_en
@@ -20,23 +20,23 @@ scope B:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = [ ¤0.00; ¤9.00; ¤5.20 ]
+[RESULT] x = [$0.00; $9.00; $5.20]
 ```
 
 ```catala-test-inline
 $ catala Interpret -s B
 [RESULT] Computation successful! Results:
-[RESULT] y = [ ¤9.00; ¤5.20 ]
-[RESULT] z = [ false; true; true ]
+[RESULT] y = [$9.00; $5.20]
+[RESULT] z = [false; true; true]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome [ ESome ¤0.00; ESome ¤9.00; ESome ¤5.20 ]
+[RESULT] x = ESome [ESome $0.00; ESome $9.00; ESome $5.20]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] y = ESome [ ESome ¤9.00; ESome ¤5.20 ]
-[RESULT] z = ESome [ ESome false; ESome true; ESome true ]
+[RESULT] y = ESome [ESome $9.00; ESome $5.20]
+[RESULT] z = ESome [ESome false; ESome true; ESome true]
 ```
diff --git a/tests/test_array/good/fold.catala_en b/tests/test_array/good/fold.catala_en
index 69eccc95..32e71877 100644
--- a/tests/test_array/good/fold.catala_en
+++ b/tests/test_array/good/fold.catala_en
@@ -34,30 +34,28 @@ $ catala Interpret -s A
 [RESULT] Computation successful! Results:
 [RESULT]
 x =
-  [ { S id = 0; income = ¤0.00; };
-    { S id = 1; income = ¤9.00; };
-    { S id = 2; income = ¤5.20; } ]
+  [S { -- id: 0 -- income: $0.00 }; S { -- id: 1 -- income: $9.00 };
+   S { -- id: 2 -- income: $5.20 }]
 ```
 
 ```catala-test-inline
 $ catala Interpret -s B
 [RESULT] Computation successful! Results:
-[RESULT] argmax = { S id = 1; income = ¤9.00; }
-[RESULT] argmin = { S id = 0; income = ¤0.00; }
+[RESULT] argmax = S { -- id: 1 -- income: $9.00 }
+[RESULT] argmin = S { -- id: 0 -- income: $0.00 }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT]
 x =
-  ESome
-    [ ESome { S id = ESome 0; income = ESome ¤0.00; };
-      ESome { S id = ESome 1; income = ESome ¤9.00; };
-      ESome { S id = ESome 2; income = ESome ¤5.20; } ]
+  ESome [ESome S { -- id: ESome 0 -- income: ESome $0.00 };
+         ESome S { -- id: ESome 1 -- income: ESome $9.00 };
+         ESome S { -- id: ESome 2 -- income: ESome $5.20 }]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] argmax = ESome { S id = ESome 1; income = ESome ¤9.00; }
-[RESULT] argmin = ESome { S id = ESome 0; income = ESome ¤0.00; }
+[RESULT] argmax = ESome S { -- id: ESome 1 -- income: ESome $9.00 }
+[RESULT] argmin = ESome S { -- id: ESome 0 -- income: ESome $0.00 }
 ```
diff --git a/tests/test_array/good/map.catala_en b/tests/test_array/good/map.catala_en
index 4aa3cdd9..764859f9 100644
--- a/tests/test_array/good/map.catala_en
+++ b/tests/test_array/good/map.catala_en
@@ -13,13 +13,13 @@ scope B:
 ```catala-test-inline
 $ catala Interpret -s B
 [RESULT] Computation successful! Results:
-[RESULT] x = [ ¤4.00; ¤8.00 ]
-[RESULT] z = [ false; true ]
+[RESULT] x = [$4.00; $8.00]
+[RESULT] z = [false; true]
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome [ ESome ¤4.00; ESome ¤8.00 ]
-[RESULT] z = ESome [ ESome false; ESome true ]
+[RESULT] x = ESome [ESome $4.00; ESome $8.00]
+[RESULT] z = ESome [ESome false; ESome true]
 ```
diff --git a/tests/test_array/good/simple.catala_en b/tests/test_array/good/simple.catala_en
index a4cc89e9..4bb41c30 100644
--- a/tests/test_array/good/simple.catala_en
+++ b/tests/test_array/good/simple.catala_en
@@ -24,7 +24,7 @@ scope B:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = [ 0; 9; 64 ]
+[RESULT] x = [0; 9; 64]
 ```
 
 ```catala-test-inline
@@ -38,7 +38,7 @@ $ catala Interpret -s B
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome [ ESome 0; ESome 9; ESome 64 ]
+[RESULT] x = ESome [ESome 0; ESome 9; ESome 64]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
diff --git a/tests/test_array/good/simpler.catala_en b/tests/test_array/good/simpler.catala_en
index b1bf8533..365ddeae 100644
--- a/tests/test_array/good/simpler.catala_en
+++ b/tests/test_array/good/simpler.catala_en
@@ -14,12 +14,12 @@ scope A:
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
 [RESULT] w = false
-[RESULT] x = [ 0; 9; 64 ]
+[RESULT] x = [0; 9; 64]
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT] w = ESome false
-[RESULT] x = ESome [ ESome 0; ESome 9; ESome 64 ]
+[RESULT] x = ESome [ESome 0; ESome 9; ESome 64]
 ```
diff --git a/tests/test_array/good/simplest.catala_en b/tests/test_array/good/simplest.catala_en
index a5119cdd..8097cbe2 100644
--- a/tests/test_array/good/simplest.catala_en
+++ b/tests/test_array/good/simplest.catala_en
@@ -11,11 +11,11 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = [ 0; 4; 8 ]
+[RESULT] x = [0; 4; 8]
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome [ ESome 0; ESome 4; ESome 8 ]
+[RESULT] x = ESome [ESome 0; ESome 4; ESome 8]
 ```
diff --git a/tests/test_date/good/durations.catala_en b/tests/test_date/good/durations.catala_en
index 7b3417ba..5fbfa58c 100644
--- a/tests/test_date/good/durations.catala_en
+++ b/tests/test_date/good/durations.catala_en
@@ -26,22 +26,22 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] m = [0 years, 0 months, 11874 days]
-[RESULT] m2 = [0 years, 6 months, 0 days]
+[RESULT] m = [11874 days]
+[RESULT] m2 = [6 months]
 [RESULT] x = 2019-01-01
 [RESULT] y = 2002-09-30
 [RESULT] z = true
 [RESULT] z2 = true
-[RESULT] z3 = [0 years, 0 months, 5937 days]
+[RESULT] z3 = [5937 days]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] m = ESome [0 years, 0 months, 11874 days]
-[RESULT] m2 = ESome [0 years, 6 months, 0 days]
+[RESULT] m = ESome [11874 days]
+[RESULT] m2 = ESome [6 months]
 [RESULT] x = ESome 2019-01-01
 [RESULT] y = ESome 2002-09-30
 [RESULT] z = ESome true
 [RESULT] z2 = ESome true
-[RESULT] z3 = ESome [0 years, 0 months, 5937 days]
+[RESULT] z3 = ESome [5937 days]
 ```
diff --git a/tests/test_date/good/rounding_option.catala_fr b/tests/test_date/good/rounding_option.catala_fr
index 2af6ad4d..d0c7019c 100644
--- a/tests/test_date/good/rounding_option.catala_fr
+++ b/tests/test_date/good/rounding_option.catala_fr
@@ -25,5 +25,5 @@ champ d'application Test:
 ```catala-test-inline
 $ catala Interpret -s Test
 [RESULT] Computation successful! Results:
-[RESULT] r = true
+[RESULT] r = vrai
 ```
diff --git a/tests/test_date/good/simple.catala_en b/tests/test_date/good/simple.catala_en
index 4ac85c35..a593a7e1 100644
--- a/tests/test_date/good/simple.catala_en
+++ b/tests/test_date/good/simple.catala_en
@@ -17,12 +17,12 @@ $ catala Interpret -s A
 [RESULT] Computation successful! Results:
 [RESULT] x = 2019-01-01
 [RESULT] y = 2002-09-30
-[RESULT] z = [0 years, 0 months, 5937 days]
+[RESULT] z = [5937 days]
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT] x = ESome 2019-01-01
 [RESULT] y = ESome 2002-09-30
-[RESULT] z = ESome [0 years, 0 months, 5937 days]
+[RESULT] z = ESome [5937 days]
 ```
diff --git a/tests/test_dec/good/infinite_precision.catala_en b/tests/test_dec/good/infinite_precision.catala_en
index 86a03ec5..504ee90a 100644
--- a/tests/test_dec/good/infinite_precision.catala_en
+++ b/tests/test_dec/good/infinite_precision.catala_en
@@ -19,19 +19,18 @@ $ catala Interpret -s A
 [RESULT] Computation successful! Results:
 [RESULT]
 a =
-  -0.000000000000000000000000000000000000000000000000000000000078695580959228473468…
-[RESULT] x = 84.64866565265689623
-[RESULT] y = -4.3682977870532065498
-[RESULT] z = 654265429805103220650980650.570540510654
+  0.000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,078,695,580,959,228,473,468…
+[RESULT] x = 84.648,665,652,656,896,23
+[RESULT] y = -4.368,297,787,053,206,549,8
+[RESULT] z = 654,265,429,805,103,220,650,980,650.5…
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT]
 a =
-  ESome
-    -0.000000000000000000000000000000000000000000000000000000000078695580959228473468…
-[RESULT] x = ESome 84.64866565265689623
-[RESULT] y = ESome -4.3682977870532065498
-[RESULT] z = ESome 654265429805103220650980650.570540510654
+  ESome 0.000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,078,695,580,959,228,473,468…
+[RESULT] x = ESome 84.648,665,652,656,896,23
+[RESULT] y = ESome -4.368,297,787,053,206,549,8
+[RESULT] z = ESome 654,265,429,805,103,220,650,980,650.5…
 ```
diff --git a/tests/test_dec/good/rounding.catala_en b/tests/test_dec/good/rounding.catala_en
index f4e3f721..1e330ac3 100644
--- a/tests/test_dec/good/rounding.catala_en
+++ b/tests/test_dec/good/rounding.catala_en
@@ -17,16 +17,16 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = 84.648665
-[RESULT] x1 = 85.
-[RESULT] y = 4.368297
-[RESULT] y1 = 4.
+[RESULT] x = 84.648,665
+[RESULT] x1 = 85.0
+[RESULT] y = 4.368,297
+[RESULT] y1 = 4.0
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome 84.648665
-[RESULT] x1 = ESome 85.
-[RESULT] y = ESome 4.368297
-[RESULT] y1 = ESome 4.
+[RESULT] x = ESome 84.648,665
+[RESULT] x1 = ESome 85.0
+[RESULT] y = ESome 4.368,297
+[RESULT] y1 = ESome 4.0
 ```
diff --git a/tests/test_dec/good/simple.catala_en b/tests/test_dec/good/simple.catala_en
index 965d3fcf..89664b25 100644
--- a/tests/test_dec/good/simple.catala_en
+++ b/tests/test_dec/good/simple.catala_en
@@ -5,24 +5,28 @@ declaration scope A:
   context output x content decimal
   context output y content decimal
   context output z content decimal
+  output k content decimal
 
 scope A:
   definition x equals 84.648665
   definition y equals 4.368297
   definition z equals x / y
+  definition k equals 1/3
 ```
 
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = 84.648665
-[RESULT] y = 4.368297
-[RESULT] z = 19.37795552820698775747…
+[RESULT] k = 0.333,333,333,333,333,333,33…
+[RESULT] x = 84.648,665
+[RESULT] y = 4.368,297
+[RESULT] z = 19.377,955,528,206,987,757…
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome 84.648665
-[RESULT] y = ESome 4.368297
-[RESULT] z = ESome 19.37795552820698775747…
+[RESULT] k = ESome 0.333,333,333,333,333,333,33…
+[RESULT] x = ESome 84.648,665
+[RESULT] y = ESome 4.368,297
+[RESULT] z = ESome 19.377,955,528,206,987,757…
 ```
diff --git a/tests/test_dec/good/zero_after_comma.catala_en b/tests/test_dec/good/zero_after_comma.catala_en
index d05f7503..fada9ca9 100644
--- a/tests/test_dec/good/zero_after_comma.catala_en
+++ b/tests/test_dec/good/zero_after_comma.catala_en
@@ -14,12 +14,12 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = 4.
+[RESULT] x = 4.0
 [RESULT] y = 1.04
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome 4.
+[RESULT] x = ESome 4.0
 [RESULT] y = ESome 1.04
 ```
diff --git a/tests/test_exception/good/grouped_exceptions.catala_en b/tests/test_exception/good/grouped_exceptions.catala_en
index 8837f3c5..d0a44ed0 100644
--- a/tests/test_exception/good/grouped_exceptions.catala_en
+++ b/tests/test_exception/good/grouped_exceptions.catala_en
@@ -49,12 +49,12 @@ scope Benefit:
 ```catala-test-inline
 $ catala Interpret -s Benefit
 [RESULT] Computation successful! Results:
-[RESULT] benefit = ¤2000.00
-[RESULT] person = { Person age = 26; disabled = true; }
+[RESULT] benefit = $2,000.00
+[RESULT] person = Person { -- age: 26 -- disabled: true }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Benefit --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] benefit = ESome ¤2000.00
-[RESULT] person = ESome { Person age = ESome 26; disabled = ESome true; }
+[RESULT] benefit = ESome $2,000.00
+[RESULT] person = ESome Person { -- age: ESome 26 -- disabled: ESome true }
 ```
diff --git a/tests/test_func/good/param_consistency.catala_en b/tests/test_func/good/param_consistency.catala_en
index 2e4a8cb9..9805230c 100644
--- a/tests/test_func/good/param_consistency.catala_en
+++ b/tests/test_func/good/param_consistency.catala_en
@@ -34,8 +34,8 @@ scope T1:
 ```catala-test-inline
 $ catala Interpret -s T1
 [RESULT] Computation successful! Results:
-[RESULT] o1 = 20.
-[RESULT] o2 = 5.
+[RESULT] o1 = 20.0
+[RESULT] o2 = 5.0
 ```
 
 ## Multi-argument function
@@ -60,5 +60,5 @@ scope T2:
 ```catala-test-inline
 $ catala Interpret -s T2
 [RESULT] Computation successful! Results:
-[RESULT] o = 40.
+[RESULT] o = 40.0
 ```
diff --git a/tests/test_literate/good/test_grave_char.catala_fr b/tests/test_literate/good/test_grave_char.catala_fr
index 77c74e03..0c324411 100644
--- a/tests/test_literate/good/test_grave_char.catala_fr
+++ b/tests/test_literate/good/test_grave_char.catala_fr
@@ -30,17 +30,17 @@ int main(void) { return 0; }
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] literate_parsing_is_ok = true
+[RESULT] literate_parsing_is_ok = vrai
 ```
 
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] literate_parsing_is_ok = true
+[RESULT] literate_parsing_is_ok = vrai
 ```
 
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] literate_parsing_is_ok = true
+[RESULT] literate_parsing_is_ok = vrai
 ```
diff --git a/tests/test_literate/good/test_grave_char.catala_pl b/tests/test_literate/good/test_grave_char.catala_pl
index 9fe66fe2..7c6f984d 100644
--- a/tests/test_literate/good/test_grave_char.catala_pl
+++ b/tests/test_literate/good/test_grave_char.catala_pl
@@ -30,17 +30,17 @@ int main(void) { return 0; }
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] literate_parsing_is_ok = true
+[RESULT] literate_parsing_is_ok = prawda
 ```
 
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] literate_parsing_is_ok = true
+[RESULT] literate_parsing_is_ok = prawda
 ```
 
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] literate_parsing_is_ok = true
+[RESULT] literate_parsing_is_ok = prawda
 ```
diff --git a/tests/test_money/good/literal_parsing.catala_en b/tests/test_money/good/literal_parsing.catala_en
index 00c52f64..f2904fe3 100644
--- a/tests/test_money/good/literal_parsing.catala_en
+++ b/tests/test_money/good/literal_parsing.catala_en
@@ -14,12 +14,12 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = ¤0.30
-[RESULT] y = ¤0.30
+[RESULT] x = $0.30
+[RESULT] y = $0.30
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome ¤0.30
-[RESULT] y = ESome ¤0.30
+[RESULT] x = ESome $0.30
+[RESULT] y = ESome $0.30
 ```
diff --git a/tests/test_money/good/simple.catala_en b/tests/test_money/good/simple.catala_en
index 88c5bd41..89bc4322 100644
--- a/tests/test_money/good/simple.catala_en
+++ b/tests/test_money/good/simple.catala_en
@@ -15,14 +15,14 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] x = ¤123.54
-[RESULT] y = ¤8548650.96
-[RESULT] z = ¤7.23
+[RESULT] x = $123.54
+[RESULT] y = $8,548,650.96
+[RESULT] z = $7.23
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome ¤123.54
-[RESULT] y = ESome ¤8548650.96
-[RESULT] z = ESome ¤7.23
+[RESULT] x = ESome $123.54
+[RESULT] y = ESome $8,548,650.96
+[RESULT] z = ESome $7.23
 ```
diff --git a/tests/test_name_resolution/good/let_in.catala_en b/tests/test_name_resolution/good/let_in.catala_en
index e12dc28a..60173816 100644
--- a/tests/test_name_resolution/good/let_in.catala_en
+++ b/tests/test_name_resolution/good/let_in.catala_en
@@ -28,8 +28,8 @@ scope S:
 ```catala-test-inline
 $ catala Interpret -s S
 [RESULT] Computation successful! Results:
-[RESULT] a = { A x = -2.; y = { B y = false; z = -1.; }; }
-[RESULT] b = { B y = true; z = 42.; }
+[RESULT] a = A { -- x: -2.0 -- y: B { -- y: false -- z: -1.0 } }
+[RESULT] b = B { -- y: true -- z: 42.0 }
 ```
 
 ## Check scope of let-in vs scope variable
@@ -55,8 +55,11 @@ $ catala Interpret_Lcalc -s S --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT]
 a =
-  ESome { A x = ESome -2.; y = ESome { B y = ESome false; z = ESome -1.; }; }
-[RESULT] b = ESome { B y = ESome true; z = ESome 42.; }
+  ESome A {
+          -- x: ESome -2.0
+          -- y: ESome B { -- y: ESome false -- z: ESome -1.0 }
+        }
+[RESULT] b = ESome B { -- y: ESome true -- z: ESome 42.0 }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s S2 --avoid_exceptions --optimize
diff --git a/tests/test_name_resolution/good/out_of_order.catala_en b/tests/test_name_resolution/good/out_of_order.catala_en
index aa281581..ea56b04c 100644
--- a/tests/test_name_resolution/good/out_of_order.catala_en
+++ b/tests/test_name_resolution/good/out_of_order.catala_en
@@ -21,13 +21,17 @@ scope S:
 ```catala-test-inline
 $ catala Interpret -s S
 [RESULT] Computation successful! Results:
-[RESULT] a = { A x = 0; y = { B y = true; z = 0.; }; }
-[RESULT] b = { B y = true; z = 0.; }
+[RESULT] a = A { -- x: 0 -- y: B { -- y: true -- z: 0.0 } }
+[RESULT] b = B { -- y: true -- z: 0.0 }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s S --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT]
-a = ESome { A x = ESome 0; y = ESome { B y = ESome true; z = ESome 0.; }; }
-[RESULT] b = ESome { B y = ESome true; z = ESome 0.; }
+a =
+  ESome A {
+          -- x: ESome 0
+          -- y: ESome B { -- y: ESome true -- z: ESome 0.0 }
+        }
+[RESULT] b = ESome B { -- y: ESome true -- z: ESome 0.0 }
 ```
diff --git a/tests/test_name_resolution/good/toplevel_defs.catala_en b/tests/test_name_resolution/good/toplevel_defs.catala_en
index 11f71b03..12ce43f7 100644
--- a/tests/test_name_resolution/good/toplevel_defs.catala_en
+++ b/tests/test_name_resolution/good/toplevel_defs.catala_en
@@ -22,8 +22,8 @@ scope S:
 ```catala-test-inline
 $ catala Interpret -s S
 [RESULT] Computation successful! Results:
-[RESULT] a = 1946.5744
-[RESULT] b = { A y = true; z = 2091.; }
+[RESULT] a = 1,946.574,4
+[RESULT] b = A { -- y: true -- z: 2,091.0 }
 ```
 
 ## Test toplevel function defs
@@ -43,7 +43,7 @@ scope S2:
 ```catala-test-inline
 $ catala Interpret -s S2
 [RESULT] Computation successful! Results:
-[RESULT] a = 154.
+[RESULT] a = 154.0
 ```
 
 ## Test function def with two args
@@ -63,7 +63,7 @@ scope S3:
 ```catala-test-inline
 $ catala Interpret -s S3
 [RESULT] Computation successful! Results:
-[RESULT] a = 2480.
+[RESULT] a = 2,480.0
 ```
 
 ## Test inline defs in toplevel defs
@@ -86,7 +86,7 @@ scope S4:
 ```catala-test-inline
 $ catala Interpret -s S4
 [RESULT] Computation successful! Results:
-[RESULT] a = 6001.
+[RESULT] a = 6,001.0
 ```
 
 ```catala-test-inline
@@ -465,21 +465,21 @@ def s(s_in:SIn):
 ```catala-test-inline
 $ catala Interpret_Lcalc -s S --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] a = ESome 1946.5744
-[RESULT] b = ESome { A y = ESome true; z = ESome 2091.; }
+[RESULT] a = ESome 1,946.574,4
+[RESULT] b = ESome A { -- y: ESome true -- z: ESome 2,091.0 }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s S2 --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] a = ESome 154.
+[RESULT] a = ESome 154.0
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s S3 --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] a = ESome 2480.
+[RESULT] a = ESome 2,480.0
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s S4 --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] a = ESome 6001.
+[RESULT] a = ESome 6,001.0
 ```
diff --git a/tests/test_scope/good/scope_call2.catala_en b/tests/test_scope/good/scope_call2.catala_en
index c9a86929..1d8b8a58 100644
--- a/tests/test_scope/good/scope_call2.catala_en
+++ b/tests/test_scope/good/scope_call2.catala_en
@@ -21,12 +21,12 @@ scope Titi:
 ```catala-test-inline
 $ catala Interpret -s Titi
 [RESULT] Computation successful! Results:
-[RESULT] fizz = { Toto foo = 1213; }
-[RESULT] fuzz = { Toto foo = 1323; }
+[RESULT] fizz = Toto { -- foo: 1,213 }
+[RESULT] fuzz = Toto { -- foo: 1,323 }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s Titi --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] fizz = ESome { Toto foo = ESome 1213; }
-[RESULT] fuzz = ESome { Toto foo = ESome 1323; }
+[RESULT] fizz = ESome Toto { -- foo: ESome 1,213 }
+[RESULT] fuzz = ESome Toto { -- foo: ESome 1,323 }
 ```
diff --git a/tests/test_scope/good/scope_call3.catala_en b/tests/test_scope/good/scope_call3.catala_en
index c5931ac7..425ec40b 100644
--- a/tests/test_scope/good/scope_call3.catala_en
+++ b/tests/test_scope/good/scope_call3.catala_en
@@ -69,28 +69,6 @@ $ catala Interpret -t -s HousingComputation
 [LOG] ←  HousingComputation.f
 [LOG] ≔  HousingComputation.result: 3
 [RESULT] Computation successful! Results:
-[RESULT]
-f = λ (x: integer) →
-  error_empty
-    ⟨true
-     ⊢ (let result : RentComputation =
-          (λ (RentComputation_in: RentComputation_in) →
-           let g : integer → integer =
-             λ (x1: integer) →
-             error_empty ⟨true ⊢ x1 + 1⟩
-           in
-           let f : integer → integer =
-             λ (x1: integer) →
-             error_empty ⟨true ⊢ g (x1 + 1)⟩
-           in
-           { RentComputation f = f; })
-            {RentComputation_in}
-        in
-        let result1 : RentComputation =
-          { RentComputation f = λ (param0: integer) → result.f param0; }
-        in
-        if true then result1 else result1).
-         f
-         x⟩
+[RESULT] f = <function>
 [RESULT] result = 3
 ```
diff --git a/tests/test_scope/good/scope_call4.catala_en b/tests/test_scope/good/scope_call4.catala_en
index d66d294b..3dd36ae2 100644
--- a/tests/test_scope/good/scope_call4.catala_en
+++ b/tests/test_scope/good/scope_call4.catala_en
@@ -25,41 +25,13 @@ scope RentComputation:
 ```catala-test-inline
 $ catala Interpret -s RentComputation
 [RESULT] Computation successful! Results:
-[RESULT]
-f1 = λ (x: integer) →
-  error_empty ⟨true ⊢ let x1 : integer = x + 1 in
-                      error_empty ⟨true ⊢ x1 + 1⟩⟩
-[RESULT]
-f2 = λ (x: integer) →
-  error_empty ⟨true ⊢ let x1 : integer = x + 1 in
-                      error_empty ⟨true ⊢ x1 + 1⟩⟩
+[RESULT] f1 = <function>
+[RESULT] f2 = <function>
 ```
 
 ```catala-test-inline
 $ catala Interpret_Lcalc -s RentComputation --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT]
-f1 =
-  ESome
-    (λ (x: integer) →
-     ESome
-       match
-         (match (ESome (λ (x1: integer) → ESome (x1 + 1))) with
-          | ENone _ → ENone _
-          | ESome g → g (x + 1))
-         with
-       | ENone _ → raise NoValueProvided
-       | ESome f1 → f1)
-[RESULT]
-f2 =
-  ESome
-    (λ (x: integer) →
-     ESome
-       match
-         (match (ESome (λ (x1: integer) → ESome (x1 + 1))) with
-          | ENone _ → ENone _
-          | ESome g → g (x + 1))
-         with
-       | ENone _ → raise NoValueProvided
-       | ESome f2 → f2)
+[RESULT] f1 = ESome <function>
+[RESULT] f2 = ESome <function>
 ```
diff --git a/tests/test_struct/good/nested3.catala_en b/tests/test_struct/good/nested3.catala_en
index 8b023377..1487f5f1 100644
--- a/tests/test_struct/good/nested3.catala_en
+++ b/tests/test_struct/good/nested3.catala_en
@@ -37,25 +37,26 @@ scope B:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] t = { T a = { S x = 0; y = false; }; b = { S x = 1; y = true; }; }
+[RESULT]
+t = T { -- a: S { -- x: 0 -- y: false } -- b: S { -- x: 1 -- y: true } }
 ```
 
 ```catala-test-inline
 $ catala Interpret -s B
 [RESULT] Computation successful! Results:
 [RESULT] out = 1
-[RESULT] t = { T a = { S x = 0; y = false; }; b = { S x = 1; y = true; }; }
+[RESULT]
+t = T { -- a: S { -- x: 0 -- y: false } -- b: S { -- x: 1 -- y: true } }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT]
 t =
-  ESome
-    { T
-      a = ESome { S x = ESome 0; y = ESome false; };
-      b = ESome { S x = ESome 1; y = ESome true; };
-    }
+  ESome T {
+          -- a: ESome S { -- x: ESome 0 -- y: ESome false }
+          -- b: ESome S { -- x: ESome 1 -- y: ESome true }
+        }
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
@@ -63,9 +64,8 @@ $ catala Interpret_Lcalc -s B --avoid_exceptions --optimize
 [RESULT] out = ESome 1
 [RESULT]
 t =
-  ESome
-    { T
-      a = ESome { S x = ESome 0; y = ESome false; };
-      b = ESome { S x = ESome 1; y = ESome true; };
-    }
+  ESome T {
+          -- a: ESome S { -- x: ESome 0 -- y: ESome false }
+          -- b: ESome S { -- x: ESome 1 -- y: ESome true }
+        }
 ```
diff --git a/tests/test_struct/good/same_name_fields.catala_en b/tests/test_struct/good/same_name_fields.catala_en
index 433a3d4a..e13a53bc 100644
--- a/tests/test_struct/good/same_name_fields.catala_en
+++ b/tests/test_struct/good/same_name_fields.catala_en
@@ -26,7 +26,7 @@ $ catala Interpret -s A
   │                       ‾‾‾
   └─ Article
 [RESULT] Computation successful! Results:
-[RESULT] x = { Foo f = 1; }
+[RESULT] x = Foo { -- f: 1 }
 [RESULT] y = 1
 ```
 ```catala-test-inline
@@ -39,6 +39,6 @@ $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
   │                       ‾‾‾
   └─ Article
 [RESULT] Computation successful! Results:
-[RESULT] x = ESome { Foo f = ESome 1; }
+[RESULT] x = ESome Foo { -- f: ESome 1 }
 [RESULT] y = ESome 1
 ```
diff --git a/tests/test_struct/good/simple.catala_en b/tests/test_struct/good/simple.catala_en
index 8532f6fb..43b6cbb5 100644
--- a/tests/test_struct/good/simple.catala_en
+++ b/tests/test_struct/good/simple.catala_en
@@ -20,12 +20,12 @@ scope A:
 ```catala-test-inline
 $ catala Interpret -s A
 [RESULT] Computation successful! Results:
-[RESULT] s = { S x = 1; y = 2; }
+[RESULT] s = S { -- x: 1 -- y: 2 }
 [RESULT] z = 3
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s A --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
-[RESULT] s = ESome { S x = ESome 1; y = ESome 2; }
+[RESULT] s = ESome S { -- x: ESome 1 -- y: ESome 2 }
 [RESULT] z = ESome 3
 ```
diff --git a/tests/test_typing/good/overload.catala_en b/tests/test_typing/good/overload.catala_en
index 23d2eef8..0b3a0929 100644
--- a/tests/test_typing/good/overload.catala_en
+++ b/tests/test_typing/good/overload.catala_en
@@ -61,19 +61,19 @@ scope S:
 $ catala Interpret -s S
 [RESULT] Computation successful! Results:
 [RESULT] o_b = true
-[RESULT] o_d = [0 years, 0 months, -13 days]
+[RESULT] o_d = [-13 days]
 [RESULT] o_i = -5
-[RESULT] o_m = ¤-5.75
+[RESULT] o_m = $-5.75
 [RESULT] o_t = 2022-01-24
-[RESULT] o_x = 0.14285714285714285714…
+[RESULT] o_x = 0.142,857,142,857,142,857,14…
 ```
 ```catala-test-inline
 $ catala Interpret_Lcalc -s S --avoid_exceptions --optimize
 [RESULT] Computation successful! Results:
 [RESULT] o_b = ESome true
-[RESULT] o_d = ESome [0 years, 0 months, -13 days]
+[RESULT] o_d = ESome [-13 days]
 [RESULT] o_i = ESome -5
-[RESULT] o_m = ESome ¤-5.75
+[RESULT] o_m = ESome $-5.75
 [RESULT] o_t = ESome 2022-01-24
-[RESULT] o_x = ESome 0.14285714285714285714…
+[RESULT] o_x = ESome 0.142,857,142,857,142,857,14…
 ```