When saving a sitelink in an item. Wikidata UI is reporting 2 error messages with essentially the same content but different wording. One of them is translated and one of them is not when setting the interface language to something other than English.
There should only be one message. It should be translatable.
Steps to reproduce (production)
- Open http://wikidata.org/wiki/Wikidata:SandboxItem
- Add a sitelink that is already used on another item
- See the error message
(Can also be reproduced on test.wikidata.org)
To reproduce locally
- Just needs Wikibase extension with a client setup and an item with a sitelink already existing.