protected fun getNotForRoot(translatable: Translatable, locale: Locale): String?
Overrides PropertiesBasedTranslationSupplier.getNotForRoot
Returns the translation for the given translatable and the given locale or null if it does not have
any translation.
It does not have to check if locale is Locale.ROOT anymore, this is already done in get.
Return
The translation or null if no translation was found.