In NSIS file these items are not translated and not set multilanguage strings
InstType Full
InstType Minimal
Section "Scribus Files (required)" ; Section_0
Section "Additional fonts" ; Section_4
Section "Desktop Shortcut" ; Section_6
Section /o "Shortcuts for All Users" ; Section_7
DetailPrint "Installing Scribus Files..."
DetailPrint "Installing runtimes..."
DetailPrint "Installing Antiword in application directory..."
DetailPrint "Installing Python files..."
DetailPrint "Installing additionnal fonts..."
DetailPrint "Registering file association..."
DetailPrint "Installing Desktop shortcut..."
All these strings should be transformed as translatable string. Example
InstType $(LSTR_92)
InstType Minimal $(LSTR_93)
LangString LSTR_92 1033 "Full"
LangString LSTR_93 1033 "Minimal"
Thanks.