Sprachbund

"The introduction of the new term Proto-Munda is justified by the fact that, as early as the Vedic period, the Munda languages had departed considerably from the Austro-Asiatic type of language and developed a character of their own brought about by a number of dialectal phonetic changes and the introduction of suffixes in the word-formation. Both phenomena mark the beginning of a process of "Dravidization" of the Munda tongues which has ultimately given them the character of agglutinating languages and has thus contributed to the growth of the Indian linguistic league (Sprachbund)."

"The linguist reader will recognize that the Takia/Waskia, Mixe Basque/ Gascon, Romansch/Swiss German and Sauris German/Friulian pairs each form a small Sprachbund ('language alliance'). Probably the best-known Sprachbund consists of modern Greek, Albanian, Romanian, and the southern Slav languages Macedonian, Bulgarian, Serbian and Croatian, which through centuries of contact have undergone metatypy to the extent that there are very close semantic and syntactic […]"