It's probably best to write in the language you are most comfortable in (which, if you're an émigré, might be a language you acquired later in life) and get tra

It's probably best to write in the language you are most comfortable in (which, if you're an émigré, might be a language you acquired later in life) and get translators to translate it into whichever languages have a viable market for it. If you have a good understanding of some of those languages then you can even supervise the translation. You'll get a better result that way and it'll probably cost less, too, if you value your own time. Umberto Eco heavily supervised some of the translations of his books and has written about that process. He's rather a special case, of course: his books are not the easiest to translate even with the author's help.