No vote is required since I'm the only developer and committer until now.

Yes, I get it. But how did you know a new feature was wanted if it hadn't been requested in the forum? And if user's idea differed from yours on some features, how did you handle it?

I have to send 14 emails (and sometimes wait for some answers during weeks) to update the 16 languages included in Sweet Home 3D.

Were these emails sent to relevant translators?

Send me by email the translated HTML file once done.

Fine. I'm working on it now but might take some time since I need to attend several classes.

but I made some small changes recently to clean the code and will publish it sooner or later.

Great! That could be easier to manage updates on web pages.