Steps to replicate the issue (include links if applicable):
What happens?:
The edit summaries all begin with a string such as "wbeditentity-create-item:0|" or "wbeditentity-create:2|de".
What should have happened instead?:
The edit summaries should all begin with a string such as "নতুন একটি আইটেম তৈরি হয়েছে" in Bengali or "Created a new Item" in English (depending on the interface language).
Software version (skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):
This affects all entries in Special:NewPages when filtering for the Property, Lexeme, and EntitySchema namespaces as well. Special:RecentChanges and Special:Contributions both display the translated edit summary messages properly.