interact
e.g.
In this era, Ainu villages interacted with Japanese people through the fur trade, and therfore knowledge of basic Japanese was required. Roughly a third of the Ainu people of the time could speak Japanese well. 当時のアイヌ民族は和人と毛皮などの商取引のため 必要に駆られて日本語を身につけており 全体の約3割が日本語を使いこなしていた (/yupeco/『ゴールデンカムイ』11話)