Alpinia galanga (also Languas galanga), a plant in the ginger family, is an herb used in cooking, especially in Indonesian and Thai cuisines. It is one of four plants known as galangal and is differentiated from the others with the common name greater galangal (or simply Thai galangal). The galangals are also called blue ginger or Thai ginger.
Alpinia galanga is called laos in Indonesian and is the most common form of galangal used in cooking. It is also known as lengkuas and galanga root. In the Philippines, it is known as langkawas. In Manipuri, it is known as kanghu. In Myanmar, it is called pa de kaw, In Cambodia, it is called romdeng.