A dialect is a regional or social variety of a language distinguished by pronunciation, grammar, or vocabulary.
Here are some other words that might be related to your query:
* Slang: Informal language used by a particular group of people.
* Jargon: Specialized vocabulary used by a particular group, often related to a profession or hobby.
* Idiom: A phrase or expression that has a figurative meaning that is different from the literal meaning of the words.
* Proverbs: Short, well-known sayings that express a common truth or belief.
However, dialect is the most specific word to describe sayings known only to a specific area.