You say you were in a grumpy mood when you posted, but honestly I can't understand your issue at all, even allowing for your bad mood!
The guy works for a different employer for a start, so his terms of employment re breaks may be quite different from yours.
If he and his mate chat in their own language, so what? Maybe they're talking about football, cars, who knows what, but as long as they don't appear to be talking ABOUT YOU, or acting in an offensive manner, then why would it bother you? No different to any 2 guys nattering on to each other! Why would you need to feel excluded? If a female pal of yours dropped by would you feel obliged to include your colleague in your conversation?
As for his prayer breaks, maybe in the other spaces he isn't able to face the right way, and perhaps you could get your stuff together 5 minutes early so you don't interrupt his important act of faith. As for telling him to pray outside - seriously?
I do hope you're feeling less grumpy and more tolerant now, because quite honestly your original post just dounds petty and silly - sorry if you were expecting someone to agree with you!