The Minangkabau language is widely used the Minangkabau people in Riau, especially in the areas bordering West Sumatra such as Kampar, Kuantan Singingi and Rokan Hulu, which are culturally allied to Minang as well as migrants from West Sumatra. It is also currently being the "lingua franca" of Pekanbaru, the capital city in addition to Indonesian. The pronunciation of Riau Minangkabau is similar to the Payakumbuh-Batusangkar dialect, even differs from that of other dialects varieties of West Sumatra. Historically, Minangkabau language used in the Pagaruyung highlands is now spoken in the lower Siak River basin following the waves of migration from West Sumatra.