See also:

http://translatewiki.net/wiki/Category:User_languages

Not all native speakers want to or can translate into their language from English,
but users in such category on translatewiki.net are more likely to be translators.

– Krinkle

2011/9/12 Ryan Kaldari <kaldari@gmail.com>
Could someone write a tool that allows me to search for the most
recently active users on a certain project who speak a certain
language (or combination of languages) natively?

The user language categories seem to exist on most projects, so it
seem like you could use those:
http://en.wikipedia.org/wiki/Category:User_ja-N

Ryan Kaldari

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