Translation for "Re" (from posting.php)

Not all languages use "Re" word for replies.
This is used in English language, but, for example, in Romanian is "Ră" from "Răspuns" or.. another part/short of this word.
I think it must included this in language files and must be translated in each language.

This shortened word can be modified in posting.php:
<!-------------- find start -------------->
$post_data['post_subject'] = ((strpos($post_data['post_subject'], 'Re: ') !== 0) ? 'Re: ' : '') . censor_text($post_data['post_subject']);
<!-------------- find end -------------->
<!-------------- replace start -------------->
Re:
<!-------------- replace end -------------->
with what you want.
Replace both of "Re:".