Old ___, language from which "berserk" is derived (5)

I believe the answer is:

norse

(Other definitions for norse that I've seen before include "Language - senor! (anag)" , "Old Scandinavian language" , "Of old Scandinavia" , "Relating to ancient Scandinavian" , "Ancient Scandinavian language" .)

I've seen this clue in the USA Today.

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