English Abbreviations

Hi. In the middle of the night, I decided to start a topic in English.

As seen in the title, I will have a question about the English abbreviations. Can we use English abbreviations in this category? For example; "I don't know --> idk"

Is it Free to use an abbreviation like?

I'm asking, because; I can't see this in the English section rules. They are good social

No abbreviations. Yes grammar. Yes ban

(Demon emoji is trash.)

Probably It's forbidden like Turkish abbreviations.

You can read this : English Section Rules