I was wondering about this when playing around with the generator. I thought it would be helpful to have comparisons to actual languages just in terms of the general way the language sounds.
A phonetic alphabet for each language would be helpful. For example, J makes a specific sound in English, but a different sound in Spanish and yet another sound in German. So in these languages, what sound is denoted by what letter?
I mean, ultimately, I'll just make up whatever name I want, regardless, but I wanted to get a feel for how the names should sound and found that pronunciation of generated names is difficult when you don't know the rules of the alphabet. Given what's been said about language and communication in game, I imagine they have this info already, just haven't released it yet, but that's why I thought something like just giving a real-world example that sounds similar would suffice.
Also, I would think the Dras and Janoan languages would be related, since they evolved from the same tribe in more recent history when compared with the rest of Mann. Not like they would be able to understand each other now, but that they wouldn't be as far apart as African and Eastern European like the OP guessed.