Re: The mother tongue!
No, it doesn't matter what your mother tongue is.
The thing that matters is compatibility. When two people share a mother tongue, they also share other things normally- what they eat, jokes, what they wear, etc. That is why you see people subconciously perfer people of their own kind. They are familiar with that culture, they share a similar upbringing, etc..
But you also may see more familiarty and compatibility with someone that doesn;t share you mother tongue, and that is fine too! It's really whatever floats your boat....