I feel like I could navigate by pictures to buy something, but... I wouldn't, you know? Even though the site looks fine, I'd have to use Google Translate to get all the details and they might not come through properly.

Probably worth it to get it professionally translated - surely there are plenty of homestuck people who can do that for you for some Paypal - and then put up an English-language domain name. If you're serious about the market, that is.