Builds the public listen-page label: English name plus native autonym in parentheses.
Omits the parenthetical when the native name matches the English name.
Parameters
code: string
Language code (or legacy free-text).
Returns string
Label such as French (Français) or Chinese - Mandarin (普通话).
Builds the public listen-page label: English name plus native autonym in parentheses. Omits the parenthetical when the native name matches the English name.