Following the Armistice on 11 November 1918, Kuentz returned home, even before he was officially mustered out of his unit. He returned to civilian life as a postal employee, married, and had four children. His homeland was now back under French control, and Kuentz chose to acquire the French nationality so at the outbreak of the Second World War he was called to service once again, but this time by France; however, his service was short-lived, as he was soon absolved of his obligation due to his age and marital/family status. When France surrendered to Germany in 1940, he was once again a German citizen. His son François was conscripted by the German military during the war and served in the Waffen SS. François was killed in action in 1944, during the Allies' Invasion of Normandy. After the fall of the Third Reich, Kuentz became once again a French citizen, which he would remain for the rest of his life.