Simpsons wisdom is wisdom
and the left side is always linked with bad luck (I'll ask my Russian friends why) so people used a foreign word for it, to avert the Evil Eye. In Spanish, Left is a borrowed word from Basque, izquierda. In French, "gauche" has been borrowed from Gothic, goodness knows why, "wenkjan". The Italians have kept "sinistra", or bad omen.