Czech language is a West Slavic language with about 12 million native speakers; it is the majority language in the Czech Republic and spoken by Czechs all over the world. Czech is quite similar to and mutually intelligible with Slovak and, to a lesser degree, to Polish or Sorbian in eastern Germany.
Czech is widely spoken by most inhabitants of the Czech Republic, however, there is no special "language" law for its use. As given by appropriate laws, courts and authorities act and make out documents and executions in the Czech language (financial authorities also in the Slovak language). People who do not speak Czech have the right to get an interpreter. Instructions for use in Czech must be added to all marketed goods.
The right to one's own language is guaranteed by the Constitution for all national and ethnic minorities. Since May 2004, Czech is also one of the 23 official languages in the European Union.