Answer: Tamil, Telegu, Malayalam!
Explanation: Extra Explanation to define and support the answer!
Out of 21.7 Million Kannada speaking population 86% is in Karnataka. Kannada is surrounded by three literature-rich Dravidian languages (Malayalam, Tamil, Telugu) in the south & East, while in the west with Kodava and Tulu of the same Dravidian family languages and in the north with Indo Aryan family language Marathi.
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