That's about all I remember. I was really impressed with the way the author portrayed the changes in the man and the alien communication. I think the man was on a science base which got damaged.
It's a bit of a stretch, but you could be thinking of The Space Trilogy by C S Lewis.
The Space Trilogy or Cosmic Trilogy is a series of science fiction novels by C. S. Lewis, famous for his later series The Chronicles of Narnia. A philologist named Elwin Ransom is the hero of the first two novels and an important character in the third.
Sources from: https://en.wikipedia.org/wiki/The_Space_Trilogy
Out of the Silent Planet (1938), set mostly on Mars (Malacandra). In this book, Elwin Ransom voyages to Mars and discovers that Earth is exiled from the rest of the Solar System. Far back in Earth's past, it fell to an angelic being known as the Bent Oyarsa, and now, to prevent contamination of the rest of the Solar System ("The Field of Arbol"), it is known as "the silent planet" (Thulcandra).
Old Solar Language:
According to the Space Trilogy's cosmology, the speech of all the inhabitants of the Field of Arbol is the Old Solar or Hlab-Eribol-ef-Cordi. Only Earth lost the language, due to the Bent One's influence. Old Solar can be likened to the Elvish languages invented by Lewis's friend, Tolkien. The grammar is little known, except for the plurals of nouns. The plurals of some words (hross, eldil) are simple, only adding a final -a or -i; others (as for Oyarsa, sorn, hnakra), are quite complex broken plurals, adding an internal -é-, and adding or altering a final vowel (usually to -i or -u), and may also include internal metathesis (Oyéresu, séroni, hnéraki).