* Use language ISO code for language fallback instead of language ID
* Remove language and language ID from dictionary item and dictionary item translation
* ADd unit test for dictionary item translation value extension
* Make the internal service implementations sealed
* Rename translation ISO code to be more explicit in its origin (Language)
* Add breaking changes suppression
* Handle save of invalid fallback iso code
* Fixed test
* Only allow non-UserCustomCulture's
* Fixed and added tests
* Rename ISO code validation method
* Fix language telemetry test (create Swedish with the correct ISO code)
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Co-authored-by: Bjarke Berg <mail@bergmania.dk>