Modify the Menu Title

To modify the user locale menu title, update the “Toolbar Menu Title” option, or hook the ‘wpsso_user_locale_menu_title’ filter:

add_filter( 'wpsso_user_locale_menu_title',
        'customize_user_locale_menu_title', 10, 2 );

function customize_user_locale_menu_title( $menu_title, $menu_locale ) {
        return __( 'User Locale (%s)', 'your_text_domain' );
}