Hey, I saw you were interested in a Japanese translation for DLsite.
I do some translation work for DLsite (Japanese to English) and from what I've seen, you'd be able to upload an English-only version just fine, with the only issue being the loss of Japanese customers. They seem to be pushing towards getting a bigger foreign audience and started a big translation campaign to help with it. Also, I wouldn't mind giving a go at translating to Japanese but it would be my first time working on a game or translating into Japanese (as opposed to into English) and I'd probably need to double check a lot of things with you.
If you were to upload there, though, I think the game would need to be finished.