Nowadays, after the reunification of Germany, Sorbian languages are taught in schools and universities of East Germany, and so a sort of national revival is seen. Actually, they are two different languages, Upper Sorbian and Lower Sorbian, but they are very similar to each other and have only slight differences. But still, both have all common features of West Slavic languages. Phonetics present some peculiarities, for example, the verb in Lower Sorbian ends its infinitive in -s' . Vice versa, Common Slavic g remains to sound g in Lower tongue, while in Upper it is h .
Morphological peculiarities are even less special.
Upper Sorbian has 7 cases with vocative, but Lower doesn't have vocative case. All nominal and verbal forms are quite alike Polish and Czech ones. The dictionary of Sorbian, however, has suffered great and strong influence of German, and the percent of Slavic words is much lower than in other modern Slavic tongues. But this doesn't mean the death or extinction of the language, which remains productive.