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.

Karma is the total upvotes - downvotes across all posts made by an account on reddit; on the fediverse there is only upvotes (likes or boosts depending on implementation) and downvotes (dislikes) per post. Theoretically you could calculate it for your account, but because you cant display it anywhere (and it isnt used for anything) it wouldnt be of much use.

Oh, yeah I guess that would be an instance admin thing cause mine has a whole bunch in that settings box. Let them know that “undetermined” needs to be included as an selectable language.

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.