SelectAdd or Manage Accounts.
In theManage accountswindow, selectAccount info.
In thePersonal Infowindow, selectPreferences.

Yahoo Mail also supports variants of a language (for example, U.S. English vs. Australian English).
end the tab and return to your inbox.
The language change takes effect immediately.

If it doesn’t, drop off of your Yahoo Mail account and then log back in.
What Do the Yahoo Mail Language controls Do?
When youopen a Yahoo Mail account, the language used for the interface is determined by your location.

For example, if you live in the United States, the default language is English.
As a result, the buttons, menu options, and other Yahoo Mail interface elements are in English.
English isn’t the only option available, though.

Yahoo Mail supports more than 80 languages and variations of languages to select as alternatives.
The language change applies only to the Yahoo Mail interface.

Lifewire / Chelsea Damraksa