Yes, Cameyo supports unicode, so I believe something else is going on with your packages. Are you creating your packages in a clean VM using Cameyo pre-installation and post-installation snapshots, or are you building them manually?
Update: Cameyo was not assigning AppID to this particular package. The glitch will be corrected with Cameyo's next release.
In the meantime, here is a simple fix for any package that doesn't have an AppID:
From the command line, use Packager.exe with -SetProperties:AppID parameter. As an example, I go through Cameyo because it's easier to find, so it looks like this without quotes: "Cameyo-2.0.834 -exec Packager.exe -SetProperties:AppID=AppName VirtualPackageName.cameyo.exe" or you can reference Packager.exe directly instead like this: "Packager.exe -SetProperties:AppID=AppName VirtualPackageName.cameyo.exe" (Default location for Packager.exe is %appdata%\VOS\Cameyo\%Program Files%\Cameyo)