Or: In WHICH language.... ?
Yes. It just accepted both.
I would've use in qual lingua....is that completely incorrect?
ah, and this can help you as well: http://en.wiktionary.org/wiki/quale
thanks… yes, i meant to write quale…. but a typo apparently slipped in… thanks for the link :) will have a look at it in a moment :)
That is what I think is right.
You can't use "qual" for sure, but "In quale lingua..." is OK too. But native speaker would say as DL suggests.