Although some tools (e.g. Gnome Keyboard Indicator) might have trouble changing the layout, you should be able to change the keyboard layout using setxkbmap.

setxkbmap de
setxkbmap us

No even though x2go uses the same libraries. X2go aims for an even greater integration into the Linux environment. It’s not possible to use a nx client to log on to a x2go server and vice versa.

Nomachine’s nx libraries enabled the transport of whole desktop sessions over a narrow band connection. X2go does not only provide for the use with in a local area network but also allows for the integration of mobile network into the system. Further bonuses of x2go are the options to pause desktop sessions and e.g. to take it to a different thin client for further use.

Yes - the NX libraries of x2goserver are copied to /usr/lib/x2go, so they can be installed parallel to an existing freeNX installation.

No. The postgres database is only needed if you are planing to use more than one connected server (server array). Please use x2goserver-one for installation to avoid the installation of postgreSQL.

Yes, you can find it on our download page.

Yes, you can find it on our download page.

To set a print target, you'll need x2goclient. For example you can use the rdp tunneling feature of x2go.