The main distinction between sociolects (social dialects) and dialects proper (geographical dialects), which are often confused, is the settings in which they are created. A dialect's main identifier is geography: a certain region uses specific phonological, morphosyntactic or lexical rules. Asif Agha expands the concept by stating that "the case where the demographic dimension marked by speech are matters of geographic provenance alone, such as speaker's birth locale, extended residence and the like". However, a sociolect's main identifier is a socioeconomic class, age, gender, and ethnicity in a certain speech community.