Yes, oh my Lord I've been getting seriously frustrated with Mongo's documentation lately. I'm not sure if it picks the language based on location or Accept-Language, never played around with it, but it's behavior is deeply rage-inducing.
I do a web search and get a list of results for the English version, open it and it automatically changes to PT-br as soon as JS loads, but then, after a few seconds, once the page is fully loaded, it jumps back to English, while keeping the /pt-br/ slug in the URL...
What the heck??
And yeah, the translation is very obviously not human made or reviewed. Furthermore, I'm PT-pt, so the differences to PT-br just make the experience even more annoying X)