diff --git a/check_strings.py b/check_strings.py
index 76713810..6addc898 100755
--- a/check_strings.py
+++ b/check_strings.py
@@ -40,7 +40,7 @@ def check_duplicate_values(strings):
                 seen[v] = k
 
 
-def check_prefixes(k, v, s_max_words, s_max_len):
+def check_prefixes(k, v, s_max_words, s_max_len, punctuation, q_endings):
     errs = []
     if k.startswith("s_"):
         if len(v) > s_max_len:
@@ -53,11 +53,11 @@ def check_prefixes(k, v, s_max_words, s_max_len):
         if ". " in v:
             errs.append("Spans multiple sentences")
     elif k.startswith("p_"):
-        if v[-1] not in ".!":
+        if punctuation and not any(v.endswith(p) for p in punctuation):
             errs.append("Doesn't end in punctuation")
     elif k.startswith("q_"):
-        if not v.endswith("?"):
-            errs.append("Doesn't end in '?'")
+        if q_endings and not any(v.endswith(q) for q in q_endings):
+            errs.append("Doesn't end in question mark.")
     return errs
 
 
@@ -79,6 +79,8 @@ def lint_strings(strings, rules):
                 v,
                 rules.get("s_max_words", 4),
                 rules.get("s_max_len", 32),
+                rules.get("punctuation", [".", "!"]),
+                rules.get("q_endings", ["?"]),
             )
         )
         errs.extend(check_misc(k, v))
diff --git a/lib/l10n/app_ja.arb b/lib/l10n/app_ja.arb
index 967772d8..42c0d697 100644
--- a/lib/l10n/app_ja.arb
+++ b/lib/l10n/app_ja.arb
@@ -16,6 +16,8 @@
     },
 
     "@_lint_rules": {
+        "punctuation": ["。", "！"],
+        "q_endings": ["?", "？"],
         "s_max_words": 4,
         "s_max_length": 32
     },