L'Ecole Cinq Lumiere

Cinq Lumiere is the school the Cures in Yes! Precure 5 and its sequel attend.

Etymology
L'Ecole Cinq Lumiere comes from the French words l'école, meaning school, cinq, meaning five, lumière, meaning light. On Toei's official website, it is called サンクルミエール学園 (Sanku Rumiēru Gakuen), with サンクルミエール (Sanku Rumiēru) being Cinq Lumiere and 学園 (gakuen) being a Japanese word meaning school or academy. With either name, an English translation would roughly be Five Light School or Five Light Academy.