The settings that can be adjusted by the “language” property file are:
menu labels and menu item labels
tooltip
Menu labels can be set according to the language, for e.g. menu item “cut” could have menu label cutLabel = Cut in English version of property file (“Text.properties”), but cutLabel=Couper in French version of property file (“Text_fr.properties”).
Tooltips of toolbar buttons are managed by property file lines like following line for adjusting tooltip text of cut button: cutTooltip=Move selection to clipboard.