That's assuming users aren't resetting their locale. It's not uncommon for non english users to assume that the english version of a site is the real deal and their version is an inferior localization done by some backbenchers at whatever company made it.

For example, here's a story about how the majority of power users in Poland use an english keyboard with specialized key bindings, because using a polish keyboard marks you as a n00b: https://medium.com/medium-eng/the-curious-case-of-disappeari...