Annoying red dots under texts
I have disable "Correct spelling automatically" in system preferences and in the app, for example notepad, Edit/Spelling and grammar -> nothing activated there. Still there are red dot underlined words. This is very irritating because for me there are lots and lots of red dotted words for 2 reasons: 1. I write program code and most of the terms Apple dictionary doesn't know and 2. My language is Finnish which obviously isn't Apple's native language.
So please let me know how to get rid of those spelling correction hints or what ever they are.
Thank you.
MacBook Pro