* Fix embed loader not translated with #locale

* Fix unit tests

* Add E2E tests

* Fix a case where the lcoale is failed to load

* Simplify conditions in `LocaleProvider`



* Make E2E tests faster



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Co-authored-by: Mahatthana (Kelvin) Nomsawadi <me@bboykelvin.dev>
Co-authored-by: Nicolò Pretto <info@npretto.com>