I think it is a nice feature that you can choose between different voices from different cultural backgrounds but I think the military should only have clear western or american voices and the terrorits should stick to arabic or russian voices.
It is really confusing when you are playing as military and hear an arabic accent behind you and think it is an enemy but it is actually a teammate. This is really confusing at times.
And please dont be a sjw on this topic. It is a brutal and realistic game and this feature is not really improving the gameplay imho.