Writing a novel in a foreign language??

[Melissa T]

I've been writing a novel, and so far it's in a foreign language. I don't know why but somehow I felt more comfortable with writing it in that language than my mother tounge. Do you think I should translate it into my own language?? Like, would it sell less just because it's in a foreign language when it's published?? (I'll get it published in my own country where the language I wrote the novel in is spoken as a fairly common foreign language).