Steps to replicate the issue (include links if applicable):
Open a ContentTranslation page on fr.wikipedia.org. Find content generated by a template. Click on it.
What happens?:
The side bar shows the template that generates the content with a link.
The link is broken because its href is double-encoded (in this case to https://en.wikipedia.org/wiki/Mod%25C3%25A8le:Chem2)
What should have happened instead?:
The URL should not be double encoded. Additionally, the namespace for the model should probably match the localized namespace for the destination wiki (Modèle:Chem2 does not work on enwiki).
