Guacamole seems to work now with Swiss German, my test system used the old guacd. With guacd 1.1.0 I don’t get the fallback to English anymore. I can use Swiss German now, even if English is set as system default on Windows.
guacd[12619]: INFO: Loading keymap "base"
guacd[12619]: INFO: Loading keymap "de-ch-qwertz"
I’ll try update the module to the unstable 1.1.0 and go stable as soon as guacamole 1.1.0 is released.
BTW, nice scenario, thanks for sharing!