From The Art and Popular Culture Encyclopedia
The orthography of a language specifies the correct way of using a specific writing system to write the language. Where more than one writing system is used for a language, for example for Kurdish, there can be more than one orthography. Orthography is derived from Greek ὀρθός orthós ("correct") and γράφειν gráphein ("to write"). Orthography is distinct from typography.
While "orthography" colloquially is often used synonymously with spelling, spelling is only part of orthography. Other elements of the field of orthography are hyphenation, capitalization, word breaks and punctuation. Orthography describes or defines the set of symbols (graphemes and diacritics) used, and the rules about how to write these symbols.