I clicked on the Linux donation page root@Linuxmint and it was in English. My mother tongue is also English.
Then after filling in the info and putting my Panama Address, it switched to Spanish.
It would be really nice to keep the page in English and have the language of the address entered as optional? I think that there are probably many people whose mother tongue is not the language of the country they live in, and it would satisfy our minority of folks. Google pops up to translate the webpage, but I can translate better than Google and I still don't understand much of a form such as yours in Spanish.
This may seem nit picky, but when I start on a page in English, it would be cool to continue the process in English as it was my choice in the first place.