Translation updates. Almost done I think.

scripts/validate_i18n_catalog.py

@@ -34,7 +34,13 @@ def parse_ini(path: Path) -> Dict[str, str]:
         if not key:
             continue
 
-        full_key = key if not section or "." in key else f"{section}.{key}"
+        if not section:
+            full_key = key
+        elif section == "messages":
+            full_key = key if "." in key else f"{section}.{key}"
+        else:
+            section_prefix = f"{section}."
+            full_key = key if key.startswith(section_prefix) else f"{section_prefix}{key}"
         result[full_key] = unescape_ini_value(value)
 
     return result