Hello @kisak-valve the bug of the language is not related to the game but to Proton (#1476).
So please could you add the "Whitelisted" label?
Hello @legluondunet, please copy your system information from steam (Steam -> Help -> System Information) and put it in a gist, then include a link to the gist in this issue report.
Works fine with proton 5.0-2.
proton 5.0-2x1 2020-02
Hello,
Zeno Clash works very well with SteamPlay.
The only bug I found: normally this game, like most of the Steam games, uses the same language interface as Steam.
On Windows, if Steam interface is set to "French", Zeno Clash launches with French menu and subtitles. But with Proton, the game launches only in english.
If this bug is resolved, the game could be Whitelisted.