[HELP] Modify road name in maps

Dear Navitotal experts,

Can anyone teach me how to modify the road name appear in maps? For example, my maps is Vietnam, when papago do the navigation, it will show the road name like this: "Võ Văn Tần/Vo Van Tan", i want to keep "Võ Văn Tần" and remove "Vo Van Tan". Need your help...

If you do that, may be you can not use road search, poi search because papago don't have vietnamese keyboard.
You can edit the road name by open .ntg,.nti... files

thainl wrote:If you do that, may be you can not use road search, poi search because papago don't have vietnamese keyboard.
You can edit the road name by open .ntg,.nti... files

May i know what program to use to edit *.ntg & .nti files?