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Can’t Input Japanese Text in Steam Game Using Apple Developer Game Porting Toolkit

I’m running Whiskey Version 1.1.0 (17), os Sonoma Version 14.0 Beta (23A5312d), Steam is up to date, Game Porting Toolkit 1 Beta 3. I’m trying to run a Japanese game, Winning Post 10 2023 that requires typing to begin the game (player name, horse names, etc). In the past when this happened, I’d do the following:

On Steam click on the game in my library -> manage (settings) -> General -> Launch Options -> LANG=ja_JP.UTF-8 %command%.

However, when I do this now, it says “command not found”. How can I enable Japanese locale within Whisky to be able to type full-width Japanese characters within games?

More info about Whisky: Whisky provides a clean and easy to use graphical wrapper for Wine built in native SwiftUI. You can make and manage bottles, install and run Windows apps and games, and unlock the full potential of your Mac with no technical knowledge required. Whisky is built on top of CrossOver 22.1.1, and Apple’s own Game Porting Toolkit.

Thanks so much,
hmlaa