sourceLocale not used for LOCALE_ID in angular 19 #59422
Description
Which @angular/* package(s) are the source of the bug?
core
Is this a regression?
Yes
Description
Documentation describes setting the LOCALE_ID with sourceLocale in angular.json. This doesn't work with angular19 and/or new application executor.
LOCALE_ID is always en-US
Please provide a link to a minimal reproduction of the bug
No response
Please provide the exception or error you saw
Please provide the environment you discovered this bug in (run ng version)
NX Report complete - copy this into the issue template
Node : 22.11.0
OS : darwin-arm64
Native Target : aarch64-macos
npm : 10.9.0
nx : 20.3.0
@nx/js : 20.3.0
@nx/jest : 20.3.0
@nx/eslint : 20.3.0
@nx/workspace : 20.3.0
@nx/angular : 20.3.0
@nx/cypress : 20.3.0
@nx/devkit : 20.3.0
@nx/eslint-plugin : 20.3.0
@nx/module-federation : 20.3.0
@nx/plugin : 20.3.0
@nx/storybook : 20.3.0
@nx/web : 20.3.0
@nx/webpack : 20.3.0
typescript : 5.6.3
---------------------------------------
Registered Plugins:
@nx/eslint/plugin
---------------------------------------
Community plugins:
@ngneat/hot-toast : 6.1.0
@ngneat/spectator : 19.3.0
@ngrx/component : 19.0.0
@ngrx/component-store : 19.0.0
@ngrx/effects : 19.0.0
@ngrx/entity : 19.0.0
@ngrx/eslint-plugin : 19.0.0
@ngrx/operators : 19.0.0
@ngrx/router-store : 19.0.0
@ngrx/schematics : 19.0.0
@ngrx/store : 19.0.0
@ngrx/store-devtools : 19.0.0
@storybook/angular : 8.4.7
angular-eslint : 19.0.2
apollo-angular : 8.0.0
ng-mocks : 14.13.1
Anything else?
The documentation about sourceLocale could be extended a bit more, as it may not be clear where to set sourceLocale.