The language has a number of dialects and sub-dialects, but native Minangkabau speakers generally have no difficulty understanding the variety of dialects. The differences between dialects are mainly at the phonological level, though some lexical differences also exist. Minangkabau dialects are regional, consisting of one or more villages ("nagari"), and usually correspond to differences in customs and traditions. Each sub-village ("jorong") has its own sub-dialect consisting of subtle differences which can be detected by native speakers. The Padang dialect has become the lingua franca for people of different language regions.