List of steps to reproduce (step by step, including full links if applicable):
- type in [[File:Deuterium-tritium fusion.svg|lang=zh-hant]] and [[File:Deuterium-tritium fusion.svg|lang=zh-hans]] (as in https://test.wikipedia.wikimirror.org/w/index.php?title=Bathypterois_mediterraneus&oldid=493565)
What happens?: Mediawiki fallbacks to "zh" version.
What should have happened instead?: Displaying "zh-hans" (Simplified Chinese) or "zh-hant" (Traditional Chinese) version.