Duopoly
[ar] احتكار ثنائي
[arz] احتكار ثنائى
[az] Duopoliya
[bg] Дуопол
[ca] Duopoli
[da] Duopol
[de] Duopol
[el] Δυοπώλιο
[es] Duopolio
[eu] Duopolio