Not all, but some of the distinct sounds of the language can also be found in Hebrew - like the gutteral kh sound at the beginning of Qo'nos.
And I'm not sure why there is a "realism" issue with Scotty or humans in general calling difficult-to-pronounce with the clearly-borrowed-from-greek name Kronos, anymore than there is with English speakers calling Moskva "Moscow". You don't really think Vulcans named their world after one of our deities, do you? I'm sure the name in their tongue is something hard to pronounce for humans, too.