* Change format of user preferred languages
* Make sure user language settings are set by default
* Add missing expect to the user spec
* Fix users/misc template
* Move existing languages to a constant
* Remove commented user code
* Move languages out of User model
* Update preferred languages accordingly to the available languages
* Set user estimated language only if the language is available
* Fix Portuguese spelling #2582
* Move estimating user language logic to a service object
* Call a service from a User#estimate_default_language!
* ActiveJob for estimating default user language
* Call ActiveJob from the User#estimate_default_language
* Handle nil user email when estimating default language
* Switch user.estimate_default_language_without_delay! to estimate_default_language! in specs
