Honestly, lemmy and the fediverse as a whole will have natural growth and thats fine - mastodon has been around for like 8 years and is only recently getting a small amount of attention and mainstream usage. Like take the long view - like the really long view like 15 years from now. It’ll probably be huge, but until then we will just share memes and have a good time discussing stuff.

On the web interface, go to your account settings and out of all the languages selected; ensure that “undefined” is one of them. You can select multiple languages by holding down the “control” key and clicking. For example, right now I have both “english” and “undefined” as the languages I use.