Example file: https://commons.wikimedia.org/wiki/File:Pior%C4%85ce_kobiety_-_Ahmadabad_-_000980s.jpg
Wikitext source: |photographer = {{pl|Danuta Penkala-Gawęcka}}
Result: "Polski: Danuta Penkala-Gawęcka"
Words like "Polski:" in the example should be stripped, if possible.