I've checked and it seems to be an issue with the machine you are currently using. Maybe try working on a different computer to pinpont the issue? For specifically
-Setting my keyboard in German, all accented letters diplayed correctly on the input line
-The game engine parsed them correctly (provided that they are encoded without accents like we said)
-Whenever I pressed ß it got automatically replaced with SS, sidestepping the issue entirely (but you can set the game to recognize both as shown)
Hope this help, have fun
