How should I approach multilingual content here? I sometimes want to share an article that is in Czech or slovak language.

My options are: prefix the post with CZSK or flag emoticons or create a new account.

I don't want to bother people who don't understand the language with content they don't understand, but maintaining two accounts is a bother for me. Most clients don't support switching of accounts and also people who follow my English account don't necessarily know about the other account.

More systematic solutions would be:

A. mark the note language while writing (client can autodetect and suggest) and include it in the note as metadata. Clients could support setting languages I speak and show me only content in those languages

B. Do it on the viewer side. Detect languages of notes and show me only those I understand. Alternatively, attempt machine translation automatically

C. Don't stress too much, occasional weird language in the feed does not matter.