Tortoise is an animal with high IQ, but it can't understand human language. Although turtles can perceive human voices, they have no ability to understand human language.
The auditory system of turtles is different from that of humans. Their ears receive sound waves in a wider frequency range than humans, but they can't interpret human language. Even if humans talk to turtles, they can't understand us.
However, turtles and humans can establish some kind of emotional connection. By observing the behavior and reaction of turtles, we can understand their preferences and needs. Studies have shown that turtles can recognize the voice and smell of their owners and have certain emotional dependence on their owners.
In addition, some people may mistakenly think that turtles can understand human language because they can respond to human voices. For example, when humans talk to turtles, they may look up or face the sound source. However, these reactions do not mean that turtles can understand human language. They may just respond to the stimulation of sound, but they don't really understand what we mean.