[rjst01]

Locale I'm using as a shorthand for "the bundle of variables that your service or business needs to tweak between customers in different markets". It may determine things like currency, date/time or currency formatting, or relevant regulatory framework. My argument is that language should always be sett-able independently of the other variables locale controls.

For an example of a site that almost gets it right, see https://www.finnair.com/ . You are first prompted to set location, and then language. I say "almost" because although they will allow you to select English in any market, they won't allow you to select any offered language in any market.

In comparison, https://www.flysas.com/ you get one dropdown which sets market, currency, and language in one go.