The updated default signature in 1.19 does not seem to use the localised parentheses, showing ' (会話)' (=talk) with the latin parentheses when I use Japanese, where [[MediaWiki:Parentheses/ja]] is set to '($1)' (full-width parentheses).
Please fix it in a similar manner to r112589 and r112591.
Version: 1.19
Severity: normal