It would be lovely if such a project pans out. However, I would say that for very popular languages (Japanese, in my case), there are probably good (but paid)

It would be lovely if such a project pans out. However, I would say that for very popular languages (Japanese, in my case), there are probably good (but paid) niche apps/resources. If your target language is Finnish, there are fewer options, like another commenter points out on the parent thread.