diff --git a/rc/filetype/latex.kak b/rc/filetype/latex.kak
index a3c05d51e..3a7753116 100644
--- a/rc/filetype/latex.kak
+++ b/rc/filetype/latex.kak
@@ -33,22 +33,47 @@ provide-module latex %~
 
 add-highlighter shared/latex regions
 add-highlighter shared/latex/content default-region group
-add-highlighter shared/latex/comment region '(?<!\\)%' '\n' fill comment
+# Region for control sequence (includes latex2e arguments and options)
+# starting with unescaped \ and ending :
+# - at eol, or
+# - at word boundaries not preceded nor followed by @ : \ { } [ ] *, or
+# - after an unescaped }
+add-highlighter shared/latex/cs region '(?<!\\)(?:\\\\)*\K\\[@\w]' '/\n|(?<![@:\\{}\[\]*])(?![@:\\{}\[\]*])\b|(?<!\\)(?:\\\\)*\K\}\K' group
+add-highlighter shared/latex/comment region '(?<!\\)(?:\\\\)*\K%' '\n' fill comment
 
-# Scopes, starting with a backslash
-add-highlighter shared/latex/content/ regex '\\(?!_)\w+\b' 0:keyword
-# Options passed to scopes, between brackets
-add-highlighter shared/latex/content/ regex '\\(?!_)\w+\b\[([^\]]+)\]' 1:value
-# Content between dollar signs/pairs
-add-highlighter shared/latex/content/ regex '((?<!\\)\$(\\\$|[^$])+\$)|((?<!\\)\$\$(\\\$|[^$])+\$\$)|((?<!\\)\\\[.*?\\\])|(\\\(.*?\\\))' 0:meta
-# Emphasized text
-add-highlighter shared/latex/content/ regex '\\(emph|textit)\{([^}]+)\}' 2:default+i
-# Bold text
-add-highlighter shared/latex/content/ regex '\\textbf\{([^}]+)\}' 1:default+b
-# Section headings
-add-highlighter shared/latex/content/ regex '\\(part|section)\*?\{([^}]+)\}' 2:title
-add-highlighter shared/latex/content/ regex '\\(chapter|(sub)+section|(sub)*paragraph)\*?\{([^}]+)\}' 4:header
+# Document and LaTeX2e control sequence
+add-highlighter shared/latex/cs/ regex '(?:\\[a-zA-Z@]+)' 0:keyword
+## Options passed to LaTeX2e control sequences, between brackets
+add-highlighter shared/latex/cs/ regex '\\[a-zA-Z@]+\b\[([^\]]+)\]' 1:value
+## Emphasized text
+add-highlighter shared/latex/cs/ regex '\\(?:emph|textit|textsl)\{([^}]+)\}' 1:default+i
+## Underlined text
+add-highlighter shared/latex/cs/ regex '\\underline\{([^}]+)\}' 1:default+u
+## Bold text
+add-highlighter shared/latex/cs/ regex '\\textbf\{([^}]+)\}' 1:default+b
+## Section headings
+add-highlighter shared/latex/cs/ regex '\\(part|section)\*?\{([^}]+)\}' 2:title
+add-highlighter shared/latex/cs/ regex '\\(chapter|(sub)+section|(sub)*paragraph)\*?\{([^}]+)\}' 4:header
 
+# LaTeX3 control sequence
+## Functions (expl3 doc) module_name:arguments_types.
+add-highlighter shared/latex/cs/ regex '\\(?:__|@@_)?[a-zA-Z@]+_\w+(:[nNpTFDwcVvxefo]+)?' 0:function 1:+db@type
+## Variables (expl3 doc): scope_name_type
+add-highlighter shared/latex/cs/ regex '\\([lgc]_)[a-zA-Z@]+_\w+' 0:variable 1:+db
+## l3kernel modules (l3kernel/doc/l3prefixes.csv)
+add-highlighter shared/latex/cs/ regex '\\(alignment|alloc|ampersand|atsign|backslash|bitset|bool|box|catcode|cctab|char|chk|circumflex|clist|code|codedoc|coffin|colon|color|cs|debug|dim|document|dollar|driver|e|else|empty|etex|exp|expl|false|fi|file|flag|fp|group|hash|hbox|hcoffin|if|inf|initex|insert|int|intarray|ior|iow|job|kernel|keys|keyval|left|log|lua|luatex|mark|marks|math|max|minus|mode|msg|muskip|nan|nil|no|novalue|one|or|other|parameter|pdf|pdftex|peek|percent|pi|prg|prop|ptex|quark|recursion|ref|regex|reverse|right|scan|seq|skip|sort|space|stop|str|sys|tag|term|tex|text|tilde|tl|tmpa|tmpb|token|true|underscore|uptex|use|utex|vbox|vcoffin|xetex|zero)_' 0:+db
+# LaTeX3 types (expl3 doc)
+add-highlighter shared/latex/cs/ regex '_(bool|box|cctab|clist|coffin|dim|fp|ior|iow|int|muskip|prop|seq|skip|str|tl)\b' 0:+db
+
+# This belongs to content group as the LaTeX3 convention is separating macros names, args and options
+# with spaces and thus should not be catched by the cs region
+## macros arguments
+add-highlighter shared/latex/content/ regex '(?<!\\)(?:\\\\)*\K#+[1-9]' 0:string
+## group containing words and numbers (list separated by ; , / or spaces)
+add-highlighter shared/latex/content/ regex '(?<!\\)(?:\\\\)*\K\{([\s/;,.\w\d]+)\}' 1:string
+
+# Math mode between dollar signs/pairs
+add-highlighter shared/latex/content/ regex '((?<!\\)(?:\\\\)*\K\$(\\\$|[^$])+\$)|((?<!\\)(?:\\\\)*\K\$\$(\\\$|[^$])+\$\$)|((?<!\\)(?:\\\\)*\K\\\[.*?\\\])|(\\\(.*?\\\))' 0:meta
 
 # Indent
 # ------