Giza, Egypt
Harrisburg, Pa., USA
Imabari, Japan
Jönköping, Sweden
Kinshasa, Zaire
Łódź, Poland
Mata-Utu, Wallis & Futuna (French Pacific Island Collectivity).
And with that – I think every IMO “genuine” country or territory in the world, possessing named settlements, has featured at least once.
Ndola, Zambia
Ouagadougou, Burkina Faso
Panevezys, Lithuania
Quito, Ecu … Whoops! Can’t do that one again. 
Qinhuangdao, China
Rampur, India
Going through the thread, start to finish: unless I’ve “overlooked” – the tiny but wealthy nation of Brunei, on the island of Borneo, has in fact not yet featured.
Remedying that: Seria, Brunei
Tampere, Finland
Ulm, Germany
Vardo, Norway
West Haven, Connecticut, USA
Xaxaba, Botswana
Young, Paraguay
Zibo, China