Most Badass Language

My vote is German.

Sounds very rough and intentional, aristocratic,  there must have been nothing more scary in the 1940s to people then listening to germans speak.

>>37
Forget the vocabulary and grammar. The majority of Polynesian languages have the same phonology (although actually it's not the same, but even 2x simpler), they are often syllabic too. If you have very generic knowledge of how does Japanese sound you'll probably never distinguish it.