I discovered the problem in French, but the wording is wrong in all languages. At this stage in the use of the UploadWizard formulation, when you have already uploaded several images and chosen the licences, you can remove files from the list. However, you can only do this one by one, by clicking on ‘remove’. This is the message that then appears, and which systematically, when there is only one image to remove, writes the message in the plural. So I think we should remove the ‘{{PLURAL:$1|}’ in all languages and use the singular. Thank you for your help.

Message URL: https://translatewiki.net/w/i.php?title=Special:Translate&showMessage=mwe-upwiz-license-confirm-remove&group=ext-uploadwizard-user&language=fr