principalement bedeutet auf Englisch

mainly▼◼◼◼(chiefly; for the most part)
adverb
[UK: ˈmeɪn.li] [US: ˈmeɪn.li]The Japanese live mainly on rice. = Les Japonais mangent principalement du riz.

primarily▼◼◼◼(of a primary or central nature)
adverb
[UK: ˈpraɪ.mə.rə.li] [US: praɪ.ˈme.rə.li]

predominantly▼◼◼◻(in a predominant manner)
adverb
[UK: prɪ.ˈdɒ.mɪ.nənt.li] [US: prə.ˈdɑː.mə.nənt.li]