Czech (/tʃɛk/; čeština Czech pronunciation:[ˈtʃɛʃcɪna]), historically also Bohemian[6] (/boʊˈhiːmiən, bə-/;[7] lingua Bohemica in Latin), is a West Slavic language of the Czech–Slovak group.[6] Spoken by over 10 million people, it serves as the official language of the Czech Republic. Czech is closely related to Slovak, to the point of mutual intelligibility to a very high degree.[8] Like other Slavic languages, Czech is a fusional language with a rich system of morphology and relatively flexible word order. Its vocabulary has been extensively influenced by Latin[9] and German.[10]