lingo

/ˈlɪŋɡoʊ/
noun
  1. A type of language or vocabulary used by a particular group of people, especially one that is hard for outsiders to understand.
    • The guide taught us some local lingo before we arrived.
    • I couldn't understand the computer lingo they were using.
    • Sports fans have their own lingo for talking about the game.
  2. A foreign language or dialect, often used informally.
    • Can you help me translate this? I don't know the lingo.
    • He picked up the lingo quickly after moving to Spain.
    • She learned the local lingo from her neighbors.