Re: Cant use text chat
We use to have an ongoing thread on the Battlefield forums that was kept up to date with words, phrases, and usernames that are incorrectly blocked by the BFV chat filter. EA was aware of this thread and was actively reporting these to Dice in order to get them fixed. Unfortunately EA shut down the old Battlefield forums a few months ago and I assume that thread has been lost.
With that said, what you're experiencing is an error with the AI controlled chat filter. It's extremely buggy in this game, and even blocks the name of the game itself from being said. "BF5" is blocked if you type it in chat lol. I can't guarantee this will ever be fixed since support for the game ended in early 2020, but hopefully someone from EA can fix this so you can communicate in the game you've payed for.