There is another aspect beyond raw vocabulary and grammar, and that's unspoken cultural assumptions :not abbreviations and slang, but real misunderstandings caused by different understandings of what seems to be a set of perfectly obvious sentences to both sides . A branch of my company went through a merger with another branch in a different country, and with a different language. Needless to say, it was difficult,…
This can happen also within a single culture. When two companies do some business together but instead of meeting often and talking directly (or zoom), spend weeks to carefully craft emails and never talk face to face.