Latin and other languages spellcheck - ON/OFF

I have looked through the forum and Googled the topic but I haven’t found the answer.

What I’m trying to do

I use Obsidian, among other things, for some language research. My notes are written in English or Polish and these langauges are spellchecked. I wish Latin was among the choices and I found we need to contact some Electron for this but I couldn’t find the option on their page for that (and as a non-programmer I feel a little bit lost there).
Is there a way to mark a part of text, like we do to bold it or make italics, to exclude it from the spellcheck? The red lines are really annoying when the whole sentences or paragraphs are underlined. I don’t want to turn it off completely as I want to use my notes for creating my materials (for students, articles etc).

Things I have tried

I have not idea how to do what I want to get.

This is a barebones or incomplete solution, but I also use some latin for law, and when that happens what I do is add them to the dictionary, individually (right click → add to dictionary).

It will help get rid of the red lines.

But its an incomplete solution and I hope someone offers you something better, because it doesnt “properly“ add them to the dictionary.

In case you are curious, this has 3 minor annoyances,
(1) you need to add each word effectively twice, because its capitalization dependent.
(2) if you spell them wrongly, it wont suggest the alternative you added to dictionary on right click like with official languages, you have to write it right so the lines don’t appear.
(3) It gets difficult to review them. (This is a nonexistent problem in english, but in my case for Spanish and I assume yours in polish, I end up having to add a lot of spanish words due to the dictionary included in the spellcheck being “incomplete” or at least really bad with both, suffixes and legal words, so I end up having to add tons of words to the personal dictionary. The problem is that that dictionary you have with all your words added will have both, all your words in Latin and all the words in your own language. And sometimes one messes up and adds a word that is wrongly spelled and you need to get it out of the dictionary, and searching for it becomes tedious because its just a scrollable list with everything, and sometimes spanish and latin words sound similar which makes this worse). This is an extremely specific problem, I know.