Normalaweise sagt man, Seine Frau kommt aus Indien
Could you not also say 'Seine Frau stammt aus Indien'?
They are all possible.
Yes! I was on the way to write the "good" answer, and then I thought to write what you say cause it's the normal expression
Interesting that this sentence is repeated so often in this section of lessons. Is it a good example for what they're trying to teach or something?
Well, asking to translate word India is so damn on topic ;-)
Indien ist schön!!
I think, he made a right decision. Indian Girls are pretty.
I thought "seine" is her
ist =kommt in this case
Seine Frau kommt aus Indien - is it wrong?
Idiomatically, it is the same. The difference is "is" vs "comes".
"Seine Frau ist aus Indien" = "his wife is out of India". "Seine Frau kommt aus Indien" = "his wife comes from India". They are two different ways of communicating the same thing.
Seine frau ist aus India. Why this is not correct?
Because the word for India in German is Indien. "Seine Frau ist aus Indien" is correct.
What's wrong with "Seine Frau ist von Indien?"
It's just not the right preposition used in this context.