共同语言

共同語言
gòngtóngyǔyán
  1. (linguistics) common language; lingua franca
  2. common interests and topics of conversation (between two people); something in common
  3. common language; lingua franca

Wiktionary

Entry Composition

1 共同语 gòngtóngyǔ
  1. (linguistics) common language; lingua franca
  2. common language; lingua franca
2 言 yán
  1. words
  2. speech
  3. to say
  4. to talk