Despite the Buddha’s teachings on the arbitrary nature of language, the commentarial and grammatical traditions developed a sophisticated theoretical framework to analyse, explicate and reinforce some of the key Buddhist doctrinal terms. Also, an elaborate classification system of different types of names was developed to show that the language of the Buddha was firmly grounded in the highest truth and that some terms were spontaneously arisen, even though such a concept—that words by themselves could arise spontaneously and directly embody ultimate truth—was quite foreign to their Founder.