Officialy the shorthand name of Democratic Republic of the Congo is just Congo. You should just put that your using the common Wikipedia names not shorthand names.
Respectfully disagree. I intentionally referenced Wikipedia's shorthand listing (of sovereign states) i.e. the blue, clickable names. "Congo" alone would make it indistinguishable from Republic of Congo (once Congo-Brazzaville), which would have equal claim to "Congo".