Given an English sentence, convert it into the french language.

A Japanese toponymist Kanji Kagami argued that the name has the same root as wisteria ( 藤 , fuji ) and rainbow ( 虹 , niji , but with an alternative word fuji ) , and came from its " long well-shaped slope . "
Enfin , un toponymiste japonais , Kanji Kagami , explique que le nom a la même racine que " glycine " ( fuji ) et " arc-en-ciel " ( variante de niji ) et provient de ses " longues pentes bien formées " , , .