Why did Gulliver try to speak to the Giants in several languages?

Question: Why did Gulliver try to speak to the Giants in several languages?

Answer: In the cornfield when one of the farmers, found Gulliver, he ordered all his men to look whether the other creatures could be found almost like Gulliver. But once they confirmed there was none else, the farmer took interest in Gulliver with many queries. He tried to talk with Gulliver eagerly. Supposing them to be Giants, Gulliver also reciprocated to the farmer. But all went vainly only to un-acquaintance of languages both of them. By this point , the farmer was convinced that he must be a rational creature with necessary gestures. He spoke often to Gulliver; but the sound of his voice pierced his ears like that of a water-mill, yet his words were articulated enough. So, Gulliver answered as loud as he could in several languages only to make him understood that he was not such a person better to mention a creature causing all of them harm. He often laid his ear within two yards of Gulliver. But all in vain, for they were wholly unintelligible to each other.