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No, berserk is an English word.
Your incessant questions are driving me berserk!
If I am not careful, my answer may drive you berserk.
The Whirling Dervishes seem to be going berserk.
The disgruntled postal worker went completely berserk.
That is the correct spelling of the adjective "berserk" (crazed, wild).
I went berserk to dispel my anger.