$namespaceNames['bg'] = array( 828 => 'Модул', 829 => 'Модул_беседа', );
I'd like to see confirmation from someone who's actually done translations into Bulgarian. Kolega2357 has a self-assessed skill level of 1 on a scale from 1-4, which isn't enough for me. See active translator(s) for Bulgarian.
It's OK, we can use it as it was suggested. Am I missing something, but why we need to translate custom namespaces or this one is part of MediaWiki/Translatewiki?