I was actually surprised when I read the odd facts page haha, so I dug a bit deeper and turns out there was a bit of misinformation... The robots didn't actually speak in a different language, in time they spoke english, ans they're not shut down completely, you can actually download it for yourself, the bots were just failed experiments thus they were shut down
If any of you wants to read about it
https://towardsdatascience.com/the-truth-behind-facebook-ai-inventing-a-new-language-37c5d680e5a7
Here's the link!