Put all specs for i18nMsg in a single describe method.
Put all specs for I18nPropertyService in a single describe method.
Put all specs for I18nPropertyServiceProvider in a single describe method.
Arrange specs in logical blocks.
Arrange specs in logical blocks.
Refine spec descriptions.
Refine spec descriptions.
Refine spec descriptions.
Change listening on attribute changes.
Add unit tests for the i18nParamMsg directive.
Change listening on attribute changes.
Set DefaultLanguage twice.

Set DefaultLanguage twice to check if it is put only once in the array of supported languages.
Add unit tests for the i18nAttribute directive.