noun
contrastive linguistics
Academic field that compares two or more languages to identify structural differences and similarities, often for language teaching or translation studies.
対照言語学の研究は、日本語教育に役立つ。
Research in contrastive linguistics is useful for Japanese language education.
比較言語学 (comparative linguistics) focuses on historical relationships and language families, while 対照言語学 compares languages synchronically without assuming a common origin.
Compound of 対照 (contrast, comparison) and 言語学 (linguistics). The exact historical derivation is uncertain; the term is a modern academic coinage.