noun
Refers to languages originating in the West, especially European languages. Often used in contrast to Japanese or other Asian languages.
彼は西洋語をいくつか話せる。
He can speak several Western languages.
この単語は西洋語からの借用語だ。
This word is a loanword from a Western language.
欧米語 is similar but explicitly includes both European and American languages; 西洋語 is more traditional and may focus on European languages.
Compound of 西洋 (せいよう, 'the West') and 語 (ご, 'language').