terminal/doc/cascadia
Leonard Hecker e34897cd1f
Add a language switcher using PrimaryLanguageOverride (#10309)
## Summary of the Pull Request

This PR adds a global "language" setting, which may be set to any supported BCP 47 tag.
Additionally a ComboBox is added to the settings UI under "Appearance", listing all languages with their localized names.

This PR introduces one new issue: If you change the language while the app is running, the UI will be in a torn state, as not all UI elements refresh automatically if the `PrimaryLanguageOverride` is changed.

## PR Checklist
* [x] Closes #5497
* [x] I work here
* [x] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [x] Schema updated

## Validation Steps Performed

* UI language changes when changing the "language" in settings.json before starting WT / while WT is running. ✔️
* "language" field is removed from settings.json if "Use system default" is selected. ✔️
* "language" field is added or updated in settings.json if any other language is selected. ✔️
* Removes qps- languages if debugFeatures is false. ✔️
* Correctly refreshes all UI elements with the new language. 
2021-06-10 23:24:21 +00:00
..
AddASetting.md doc: add UWP docs link to AddASetting.md (#9025) 2021-02-03 16:54:27 -08:00
Json-Utility-API.md Rework JsonUtils' optional handling to let Converters see null (#8175) 2020-11-09 15:13:02 -08:00
profiles.schema.json Add a language switcher using PrimaryLanguageOverride (#10309) 2021-06-10 23:24:21 +00:00
SettingsSchema.md Replace the "user docs" with references to the real docs (#7649) 2020-09-17 09:38:01 -07:00
Unittesting-CppWinRT-Xaml.md Upgrade Windows SDK to 19041 (#10118) 2021-05-20 16:04:25 +00:00