Possibly option for dialect control?

[jefgen]

Would there be any desire to possibly have some sort of "option" to select if the caller wanted "dialect" names?
For example for the locale “fr-CA” (as displayed in “en”) there might be the choice between "French Canada" and "Canadian French".

[littledan]

@jefgen I don't see why not. I'm wondering, is this data present in CLDR? How is it exposed by other libraries?

[jefgen]

Thanks @littledan. (Sorry for the delayed reply).

Yes, this data is already present in CLDR for some locales/languages.
For example, here is a snippet of the data for fr_CA in the neutral English locale file "en.xml".
https://www.unicode.org/repos/cldr/trunk/common/main/en.xml

<language type="fr">French</language>
<language type="fr_CA">Canadian French</language>

However, I don't think there is currently any way to get at this data from the ICU "C" API surface (though the data is present in the default ICU data file).

[FrankYFTang]

@jefgen I am taking over the champion of this proposal now. Somehow, as a novice of github I messed up the transfer process and use a different process that won't carry all the fired issues to https://github.com/tc39/proposal-intl-displaynames. Could you refile your issue in https://github.com/tc39/proposal-intl-displaynames/issues ? Check my two proposed changes on https://github.com/tc39/proposal-intl-displaynames/pulls first. I think that address the issue you have here. I would like to ask to abandon this old one but move all discussion to https://github.com/tc39/proposal-intl-displaynames/issues instead.