The rules are called good grammar.
The rules for the organization of a language is called syntax.
The rules of a language is called its syntax.
a banana
Standard Language
This is called syntactic awareness, which involves understanding the rules and structure of language to form meaningful sentences. It is an important aspect of language development and comprehension in children.
syntax error
The set of rules that explain how words are used in a language is called grammar. Grammar is made up of syntax (word order), morphology (word structure), and semantics (meaning). These rules help speakers of a language communicate effectively and understand each other.
Language - a form of communication that has rules for the use of sounds and symbols.
That aspect of language is called orthography. It encompasses the rules and conventions related to writing, including spelling, punctuation, and capitalization.
A course dealing with the rules of language is a course in grammar.
There aren't exactly set rules for good language, but using figurative language really helps people who are reading your writing interested. Similes, metaphors and personification are three examples of figurative language that aid in keeping your writing alive. See the link to Rules of language below for more information.
Another word for rule of language is Grammar.