Well…, it is very strange, that SP uninstall remove English languge ?!
1.If you get :
Exception: Microsoft.SharePoint.SPException: The language is not supported on the server. —> System.Runtime.InteropServices.COMException (0x8102005E): The language is not supported on the server.
you have to reinstall language pack.
2.If you wonder, SP Console caches .NET configuration files ?!