If you look at https://www.wikidata.org/w/index.php?title=Q10868755&action=history, the edit summaries look like: Added a language link to connect pages [↔$3]: enwiki:Template:West Germany squad UEFA Euro 1980, trwiki:Şablon:1980 Avrupa Futbol Şampiyonası, Batı Almanya
I'm guessing $3 is supposed to be something, but I'm not really sure what.
Version: master
Severity: minor
Whiteboard: backlog, papercut