Installing any edition (NetInstall or not) of Trisquel on a pendrive should
not be "acrobatic". I believe your Kubuntu has, like Ubuntu, a "Startup Disk
Creator". Just insert a USB disk/pendrive and choose Trisquel's ISO (that you
must download first). I guess it should work. Otherwise, there is UNetbootin.
You then need to reboot on the live medium you have just created (what may
require changing the boot order in the BIOS).
AMD64's processor are perfectly supported. Select a "amd64"'s ISO. Notice
that those computers often come with AMD/ATI video cards and their support is
far from perfect: no 3D acceleration is possible with the current free
drivers/firmware.
Any "language package" can be installed after the installation of any edition
of Trisquel. Distributions do not make a difference (either the application
was translated or not).