I have documented the proposal for the language selector on mobile that was
worked on during the Pune hackathon. The current method of selecting from
an unordered list of 250+ languages is not useful or helpful. This may not
be the best solution but will definitely help for a vast majority of
cases. Do give feedback on the talk page:
http://www.mediawiki.org/wiki/Universal_Language_Selector_Mobile
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j.mp/ArunGanesh