I actually did think about using google translate to even start new languages (so translators have even less work). But I found out, that the google translation API is being deprecated and I don’t want to put effort into this if it’s going offline soon.
Well for non-developers it’s actually less of a hurdle if it’s just java. I’ve thought about using electron or similar, which don’t need java, but they have a huge weight (above 100MB download for a hello world, which is even less acceptable). There are java executable wrappers, which remove the need for java, but I don’t think they’ll improve the size problem much.
So I’m guessing the only solution for you would be an online service.