Yes, but under conditions:Not violating the country local lawsgetting first wife acceptancethe non Muslim woman should be only Jewish or Christian.
She is the only wife that married him before God revelation of Quran to him and she was the first woman that believed him and become Muslim.
muslim man can't marry without telling his wives and they have the choice to stay with him or not Muslim man can marry muslim woman or woman belive in god ex: christian or Jewish .
yes, a wife deserves to know or she will find out herself eventually.
A married woman is called a wife
The other woman would be called his mistress.
results in castration
No. He is still happily Married!
an exmisstress is a woman who a husband used to cheat on his wife with.
If a married man loves another woman than his wife, he can prove it by divorcing his wife and marrying this other woman.
There is no special word for a Muslim wife.
Muslim wives are all over the world!!!. Of course they married to Muslim Husbands. I am not sure what the question asking for.