The Czechs' language separated from other Slavic tongues into what would later be called Old Czech by the thirteenth century, a classification extending through the sixteenth century. Its use of cases differed from the modern language; although Old Czech <answer>did not yet have a vocative case or an animacy distinction</answer>, declension for its six cases and three genders rapidly became complicated (partially to differentiate homophones) and its declension patterns resembled those of Lithuanian (its Balto-Slavic cousin).
How did Old Czech's use of cases differ from modern usage?
did not yet have a vocative case or an animacy distinction