• Bug 23268 has been marked as a duplicate of this bug. ***

• Bug 15165 has been marked as a duplicate of this bug. ***

• Bug 14207 has been marked as a duplicate of this bug. ***

• Bug 25817 has been marked as a duplicate of this bug. ***

• Bug 18461 has been marked as a duplicate of this bug. ***

Good, I wanted to submit this bug as well, but I didn't do so yet because this probably needs configuration per wiki. For example, on incubatorwiki it needs:
$wgBabelCategoryNames = array(
'0' => 'Users:By language:%code%-0',
'1' => 'Users:By language:%code%-1',
'2' => 'Users:By language:%code%-2',
'3' => 'Users:By language:%code%-3',
'4' => 'Users:By language:%code%-4',
'5' => 'Users:By language:%code%-5',
'N' => 'Users:By language:%code%-N'
);
$wgBabelMainCategory = 'Users:By language:%code%';

Wikimedia's wgConf setup supports that. It can be set to a default to all, and overwrite per language, per project, and per indivual wiki.

I know. (btw, it can be set per project and wiki but not per language).
Anyway, the thing is that Babel automatically creates all categories, so the configuration would need to be set *before* it is enabled, otherwise a lot of duplicate categories would be created (i.e. default "User xx" categories on a wiki that uses a different category system).

lowering priority since it doesn't look like the response to the to bug #15308 isn't a high priority.

• Bug 30188 has been marked as a duplicate of this bug. ***

I reviewed Babel back in May but forgot to tell anyone I'd done it.

https://secure.wikimedia.org/wikipedia/mediawiki/wiki/User:Catrope/Extension_review/Babel

Per Roan Kattouw on bug 15308, Babel is now deployed on all WMF wikis.