I don’t mind so much, as it encourages me to practise my German. However, it could get troublesome if lots of other languages start popping up. Mastodon has a language filter option, I guess such a feature will eventually make its way to kbin bzw lemmy…
From those graphs, memory usage is very low. Most of it is being used for disk caching, which is what linux does with memory it has no other use for (may as well use it for something).