Sure, and Chinese doesn't have tenses at all... but when you translate those languages, you don't make the Russians or Chinese sound like morons and then blame it on their language if anyone asks. Translating speech includes translating the grammar.
Any other explanation or attempt to "qualify" his poor speech is just a transparent attempt to explain away creative laziness on the parts of the devs in this regard. I'd much rather see a cultured, well spoken Qyzen than the stereotype we have now. At least it would go against type and be memorable and different....other than what we have now which is just basically a grunting big guy.