Today I tested the file import: https://commons.wikimedia.beta.wmflabs.org/wiki/File:Test_2.jpg.jpg
But as you see the field names are unknown to the information template because the German field names are used.
I suggest to add a technique for matching source wiki language -> English language
Something like a MediaWiki message [[MediaWiki:Fileimporter-Information-matching]] on the source wiki with the content
- Beschreibung | description
- Quelle | source
- Urheber | author
- Datum | date
- Genehmigung | permission
- Andere Versionen |other_versions
- Anmerkungen | notes