Sometimes the translation is so off it's actually the opposite of what the character is saying. last things that come into my mind is Zenos fight, when he's going to unleash his special move in Japanese he say something along these lines "Don't be defeated by that" and in English I believe he says "have you the strength?" Which is arguably not so off but the worst is in the french version where he screams something like "Won't you die already!"

That's completly out of character and is not the only time the translation is completly off from what the character is saying.