In Crimea, remnants of Gothic existed till the 17th century. Vowel mutations are exceedingly frequent in morphology. The Verner's Law is absent in Gothic. The noun has all four Germanic cases, adjectives and pronouns also preserved the instrumental case. Types of declension are numerous, having all three genders.
Pronouns often use the dual number, which gradually disappears in other Germanic dialects.
There is also the Indo-European reflexve pronoun seina, sis, sik 'self'. Though the sources of the Gothic language are rather scarce, there are a great lot of archaic terms which make the language most useful for comparative studies. A lot of features of orthography and plenty of words were borrowed from Greek.