Ask HN: Impact of i18n / translation on iPhone app sales?

Does anyone have any stories and/or numbers about how translation into various languages has affected iPhone app sales?

I've got an app that has made it very high in the AppStores of Hong Kong, Singapore, Malaysia and a few others, and I'm wondering if i18n would make a difference or not. I'm guessing not, because English is common there from what I have read, but I'm wondering if there are other markets that aren't English speakers/readers that would open up with translation...