Engel curve
[ar] منحنى إنجل
[ca] Corba d'Engel
[cs] Engelova křivka
[de] Engel-Kurve
[es] Curva de Engel
[hi] एंजेल वक्र
[it] Curva di Engel
[ko] 엥겔 곡선
[nl] Engelcurve
[pl] Krzywa Engla