Board Thread:Code Review/@comment-11733175-20170212225820/@comment-24473195-20170215205255

I don't think it will work very well unless someone commits to updating these forever. Fallbacks are not only linked to language similarity, they also depend on languages spoken in a certain area, e.g. some Belgium citizens  know French, English,  Arabic, and so forth. So it would fallback to one of those if the language in question is a minor language spoken mostly in Belgium.

It also gets updated from time to time, so considering that it is likely that Wikia doesn't update its mapping they will always be behind.

Anyway, for the simple fallback case this might be good enough as it is likely that wikia doesn't use  as many languages as Wikimedia.