How to say "jargon" in Japanese

• 隠語いんごCommon
  nounCovers jargon in the sense of a group's own secret, in-group vocabulary — the nuance of cant or argot, marking insider identity. Typical context: the private language of a trade or closed circle.
• ちんぷんかんぷんCommon
  noun, na-adjectiveCovers jargon as unintelligible talk from the listener's viewpoint: speech so incoherent it amounts to nonsense or babble. An expressive onomatopoeic term, usually written in kana; suits an explanation that leaves you completely lost.
  その理論りろんは私にはちんぷんかんぷんだ。↗

  The theory is too abstract for me.

Use 隠語 for jargon as the insider or secret vocabulary of a group, and 「ちんぷんかんぷん」 when jargon means talk you cannot follow — speech that is unintelligible or sounds like nonsense.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 隠語いんごsecret language
• ちんぷんかんぷんunintelligible language
• ジャーゴンjargon
• 専門語せんもんごtechnical term
• 専門用語せんもんようごtechnical term
• 通り言葉とおりことばjargon