I think there are 2 valid reasons: 1. Sometimes for legal or practical reasons other than language, the site needs to be different in different places, e.g. te

I think there are 2 valid reasons: 1. Sometimes for legal or practical reasons other than language, the site needs to be different in different places, e.g. terms and conditions, cookie popups, prices legally required to include tax etc. These have to be based on the users location. 2. Users don't set their browser language correctly. The options to change are hidden where no one looks and hard to understand - you an allow multiple languages and set a preferred order for them. I think this was common years ago, but is probably no so much the case now - it will default to the system language.