Ing langkwas, langkuas o langcuas (Alpinia galanga) (a Languas galanga mu naman),[1] a king Ingles, greater galangal o Thai galangal, a tanaman king familiang laya, metung yang yerbang gagamitan king pamaglutu, lalu na king lutung Indonesian ampong Thai. Metung ya kareng apat a tanaman a ausan dang galangal, at mayayaus la king Ingles blue ginger o Thai ginger .
Scheffer, J.J.C. & Jansen, P.C.M., 1999. Alpinia galanga (L.) Willd.[Internet] Record from Proseabase. de Guzman, C.C. and Siemonsma, J.S. (Editors). PROSEA (Plant Resources of South-East Asia) Foundation, Bogor, Indonesia. [1]