It works you're a saint alumoi, I will include it in the next patch.After applying the translation patch the inverntory sorter is fixed (it's in English now) but the part belonging to the NPC remains visible on screen after exiting the barter.
LE: found the fix: delete gl_invenfilter.int from data/scripts leaving only gl_invenfilter_se.int, glnpcslootcorpses.int and test0.int