The story
- Japanese · derived fromクール
- French · borrowed fromcours
- English todaycours
From French cours in analogy to Japanese クール (kūru), originally singular (as dictated by Anime News Network for example) but later reanalyzed as a plural form.
Words from the same roots
Frenchcours all →
cour
Japaneseクール all →
cour
Etymology from Wiktionary, CC BY-SA 4.0.