Yo, was using the mpxtool_modified and got an error when trying to repack .txt files that were machine translated (I edited only the japanese, kept the formatting the same).
OneDrive\Documents\MEGAsync Downloads\vn\mpxtool_modified\mpxtool_modified.py", line 255, in pack
dat2=dat2.encode("shift-jis-2004")
UnicodeEncodeError: 'shift_jis_2004' codec can't encode character u'\u200b' in position 3881: illegal multibyte sequence
lemme know if anyone might happen to know if there is something wrong with the tool (or if u need the text files to check or something).