What happens if I change the local-name language of a person's name?

A person can have only one local name at a time.

If you change the language of the local name, the new local name replaces the existing local name. For example, if you change a person's local-name language from Swedish to Greek, the Greek version of the person's name replaces the Swedish version. Thereafter, users who have chosen to see names in Swedish will see the global version of the person's name; only users who have chosen to see names in Greek will see the Greek version of the person's name. If you use local names, select the local-name language that's most appropriate for the user's primary work relationship and reporting requirements.