Hi there!
While many persons believe that they should release a game in English to have more attention, I found that the opposite works much better.
I'm releasing my games only in my mother language now, and my results are fair better than before. Why?
- My games a mostly comedy/parody games, and many jokes just doesn't have any meaning outside of my country;
- It's not everyone that speaks English, or at least doesn't master it, so there's a lot of persons eager to have games in their home language;
Of course, what works for me may not work for others (and vice-versa), but maybe, if you don't master English yet, releasing a game focused in your local language may be better than trying to translate it for now. =)