* Wheeking: This is a high-pitched, squeaky sound that often indicates excitement, hunger, or anticipation.
* Purring: A low, rumbling sound that shows contentment and relaxation.
* Chirping: A short, sharp sound that can express alarm or curiosity.
* Whistling: A high-pitched whistle used as a warning call.
* Squealing: A loud, piercing sound used to express fear or pain.
While we can't understand the specific meaning of every sound, we can learn to recognize their general emotional context. Experienced guinea pig owners can often tell if their pets are happy, scared, or hungry based on their vocalizations.
So, to answer your question directly, people don't understand guinea pig "language" in the same way they understand human language, but they can learn to interpret their sounds and understand their general meaning.