How does Help Center determine what locale to display to an end user accessing Help Center?
Every web browser has a language setting that is automatically detected when a user visits the Help Center. If a matching language exists, Help Center will display that language. If not, the “default” language is used in the absence of other languages. For example, if someone has their browser language settings set to Swahili and your Help Center does not have Swahili as a supported language, they will taken to the default language.
Alternatively, if English is your default language, but you also have German as a supported locale, a user with German set as their browser language will be taken to your German language Help Center.
You can find your Help Center language settings under Guide admin > Settings > Guide settings > Default language: