I experienced this a lot while growing up in a country with ~4 national languages - I spoke one of them well, but sadly only about 20% of the population speak it, so most websites will default to using the bigger national language (~70% pop) regardless of what your computer is set to.
It's really not that hard to find the language switcher on most websites, but it's still a bit annoying.
It's really not that hard to find the language switcher on most websites, but it's still a bit annoying.