in·ter·lan·guage
noun/ˈɪntəlæŋɡwɪdʒ/
/ˈɪntərlæŋɡwɪdʒ/
[uncountable, countable] (linguistics)- a language system produced by somebody who is learning a language, which has features of the language that they are learning and also of their first language
中间语言，中介语言（第二语言学习者在学习过程中形成的语言，具有所学语言和其母语的特征）