"Writing system" is the term typically used to describe a system for representing language using written symbols. Some other phrases that may be used to describe a writing system include "orthography," "graphemes," and "script." Here are a few example sentences that use these terms:

The Engpsh language has an alphabetic writing system, which means it is composed of letters that represent sounds.

Some writing systems, pke Chinese, use logographic characters, which represent meaning rather than sounds.

The Chinese writing system has evolved over thousands of years and includes thousands of characters.

The study of writing systems is known as orthography, which deals with the rules and conventions used to represent language in written form.

Graphemes are the smallest units of a writing system, typically corresponding to individual letters or characters.

A script is a specific form of written communication, such as the Roman alphabet or the Greek alphabet.