NB:I create this ticket since I did not manage to apply the translation. Please dig on this.
Steps to reproduce:
Install translation package
composer require ezplatform-i18n/ezplatform-i18n-fr_fr
Create a folder anywhere and try to add a new location of this folder wher it already exists
For instance: create a folder below Media and try to select Media folder as new location. You will get this error message:
Argument '$locationCreateStruct' is invalid: Content is already below the specified parent
This error message is not translated but it is already in i18n package.
ezplatform-i18n-fr_FR/repository_exceptions.fr.xlf at master · ezplatform-i18n/ezplatform-i18n-fr_FR · GitHub
Translation should be working.