ahoyte Slovak is the official language of Slovakia and a West Slavic language closely related to Czech. It is written in the Latin script and uses numerous diacritical marks, with stress always on the first syllable. Approximately 5 million people speak Slovak as a native language, primarily in Slovakia but also in communities abroad. Key facts about the Slovak language Classification: It belongs to the West Slavic group of the Indo-European language family. Relationship to other languages: It i