To have Commons parameter language-tagged, it should be prefixed with "@". Description and source parameters have been prefixed with @ for Information template in Extension:FileImporter/Data/fa.wikipedia#Transfer. However, when I imported c:File:کباب تابهای آبدار.jpg just a few minutes ago, none of the parameters were language-tagged, and I added {{fa|1=}} manually.
For example, try to import fa:پرونده:اشکنه خوراک ایرانی.jpg yourself and see the result.