idiomatic

adj. /ˌɪdiəˈmætɪk/ C2

地道的；成语的

Using natural expressions and idioms typical of native speakers.

仙境例句

The Duchess spoke such idiomatic English that every moral sounded like an old saying.

公爵夫人的英语说得地道极了，每个道理听起来都像一句老话。