The 50 cent word as we used to say would be the French one 'ARGOT'.
A 'cant' would be another term for secret lingo.
...innuendo, slang, encrypted sentences, a riddle may be others.
dialect or draw Know also as "colloquialisms" - common spoken expression, often regional
vocabulary, tongue, idiom, language, accent, cant, jargon, pronunciation, terminology, slang, lingo, vernacular
"The four men at the next table chatted while eating, and he could tell from their conversational lingo that they all worked at the nearby shipyard.".
Vernacular, jargon, localism, regionalism, pronunciation, lingo,
The word "lingo" refers to slang or jargon, certain special expressions and idioms that members of a particular group (like doctors, baseball players, or musicians) use with each other; these words would probably not be understandable to people not in that group. "Lingo" seems to come from the Latin word "lingua," which means a language.
Hearty (pirate lingo)
dialect, language, lingo, patter, vernacular, vocabulary, terminology, tongue, patois
clandestine
horray
angle
visa
Undisclosed and unknown are synonyms for secret.
dialect or draw Know also as "colloquialisms" - common spoken expression, often regional
Although she couldn't follow all of the lingo, she enjoyed the presentations at the trade show.
The word 'Ayoba' originated from Kasi lingo.
hide a secret or emotion
vocabulary, tongue, idiom, language, accent, cant, jargon, pronunciation, terminology, slang, lingo, vernacular