While all of the above are true, there is a variable which was a constant for thousand of years. That is that language is generally static, it doesn't change much over ten, twenty years, or fifty years. It sometimes undergoes significant changes over the centuries.

Well that constant will be transformed to a variable. While GPT can recognize and produce outputs of a language, this tool, or similar tools can be used to produce another language, totally from scratch or a variant of an existing language, instantly.

In the language context, i would argue it is a lot more difficult to produce effective spam than in the image context or video. People will change their language, the model will have to be trained again in the new language, and that is until people up their game and change language again. This is happening already, young people use different language in the internet than older people. I would be surprised if we don't witness in the near future, the internet of a million languages.