Then you better have human translated 100% accurate versions of your site. Because I've been served "spanish" automatic translations that are gibberish and make

Then you better have human translated 100% accurate versions of your site. Because I've been served "spanish" automatic translations that are gibberish and make no sense. E.g. "data uploading" auto-translated to "los datos cargando arriba", when in proper spanish it should be "subiendo datos". As spanish from Spain I, and I guess more than 80% of spanish people, prefer to read mexican written by a mexican person than "es-ES" translated by a robot. If I'm travelling to Latam, I would prefer your site serving "es-ES", after that "en-US", then "en-UK", and only after that any "es". Just like I have my browser configured. Other Spaniards may disagree and set their preferences differently, and that's fine. It's 100% easier to respect the Accept-Language header than to do geolocation gimnastics.