I agree. Translation is an art not a science, which is why people are better at it than computers!

"Leave me alone" is said like "Go away, don´t bother me."

So

"Beni rahat býrak"

or, as I prefer,

"Artýk beni rahatsýz etme"

are the polite versions.

There are various other options, ranging from mildly rude to totally rude!

 I think they meant "how do you say "I dont want to talk to you", in Turkish?", not "I don´t want to talk to you in Turkish".

Seninle görüþmek istemiyorum.

I don´t think she meant ´I don´t want to talk to you in Turkish´  I think she meant how do I say ´I don´t want to talk to you´ in Turkish.   

 yep!