language transfer

noun2

1. •
   The (correct or incorrect) application of linguistic features (grammar, vocabulary, etc.) from one language to another, such as false friends.

   • At present, language transfer is not viewed as the manifestation of a learner's inability to resist first-language patterns; instead, it is thought to interact with L2 developmental processes, […]. — 1985
2. •
   Synonym of language shift.