You can see and change active map language in the dropdown menu near the map name.
Clicking on “Add new language” opens map settings, where you can add new language or temporarily activate/deactivate languages. Don´t forget to set the language to “Active” after adding it. By clicking on the star you can change the default language.
Keep in mind, that adding a new language automatically duplicates all filled content elements of POIs, using default language. Don´t forget to replace it.
The language used will be determined by the system settings of the users device.