Mandarin is a group of Chinese language dialects that are natively spoken across most of northern and southwestern China. The group includes the Beijing dialect, the basis of the phonology of Standard Chinese, the official language of China. Because Mandarin originated in North China and most Mandarin dialects are found in the north, the group is sometimes referred to as Northern Chinese. Many varieties of Mandarin, such as those of the Southwest and the Lower Yangtze, are not mutually intelligible with the standard language. Nevertheless, Mandarin as a group is often placed first in lists of languages by number of native speakers.

The Sinitic languages, often synonymous with the Chinese languages, are a group of East Asian analytic languages that constitute a major branch of the Sino-Tibetan language family. It is frequently proposed that there is a primary split between the Sinitic languages and the rest of the family. This view is rejected by a number of researchers but has found phylogenetic support among others. The Macro-Bai languages, whose classification is difficult, may be an offshoot of Old Chinese and thus Sinitic; otherwise Sinitic is defined only by the many varieties of Chinese unified by a shared historical background, and usage of the term "Sinitic" may reflect the linguistic view that Chinese constitutes a family of distinct languages, rather than variants of a single language.