Rūpa Gosvāmī says that a person who knows the languages of different countries, especially the Sanskrit language, which is spoken in the cities of the demigods—as well as other worldly languages, including those of the animals—is called a wonderful linguist. It appears from this statement that Kṛṣṇa can also speak and understand the languages of the animals.

An old woman in Vṛndāvana, present at the time of Kṛṣṇa’s pastimes, once stated in surprise: “How wonderful it is that Kṛṣṇa, who owns the hearts of all the young girls of Brajabhūmi, can nicely speak the language of Brajabhūmi with the gopīs, while in Sanskrit He speaks with the demigods, and in the language of the animals He can even speak with the cows and buffalo! Similarly, in the language of the Kashmere Province, and with the parrots and other birds, as well as in most common languages, Kṛṣṇa is so expressive!” She inquired from the gopīs as to how Kṛṣṇa had become so expert in speaking so many different types of languages.

(The Nectar of Devotion » Chapter 21 – Wonderful Linguist | 1970 Edition)