What does it mean that the manas does not correspond to language and words?

The meaning of the manas not corresponding to written words and language is that the manas cannot use written words or language to express its own thoughts, concepts, and views. But this does not mean the manas does not understand written words and language. Since He is the master consciousness that oversees the whole situation, He has the authority to direct and mobilize the six consciousnesses. Although He cannot speak or express things in words, He can let the mind consciousness speak and let the mind consciousness express things in words; many things He cannot do Himself can be accomplished with the assistance of the six consciousnesses. For example, a president has limited energy and cannot be in many places at once, so he can only govern the overall affairs of the nation and cannot carry out specific work such as market research and statistical analysis, but he can appoint subordinates to complete these tasks. Because the manas must oversee the whole situation, He cannot personally handle specific matters and can only use the consciousness accompanied by the five senses and the solitary consciousness to deal with specific trivial affairs; the manas simply needs to listen to the reports. In the process of listening to the reports, He uses the mental factor of volition (cetanā), the mental factor of wisdom (prajñā), and the mental factor of determination (adhimokṣa) to make judgments and decisions, and then issues commands, letting the six consciousnesses solve problems according to the instructions.

The manas is like a mute person who, although unable to speak, can understand what people say. The eighth consciousness is the same: although He cannot speak and is not versed in language and words, He has His own unique mode of discernment, discerning unique information, different from the seven consciousnesses; likewise, the manas is different from the mind consciousness. The deliberation of the manas is no worse than the deliberation of the mind consciousness. If a president were to free up time and energy to specifically engage in market research, he might do it even better than his subordinates; it is only that he lacks the time and energy. If the manas were to substitute for the six consciousnesses, He might surpass them; it is only that His energy is currently insufficient. That is why one must cultivate meditative concentration, cultivate meditative concentration, and cultivate meditative concentration again — precisely to free up time and energy for the manas, to focus, focus, and focus again. Only in this way can the great wisdom of the manas emerge.

If you regard the manas as a consciousness, or as a person, you can understand the intrinsic nature and mental factors of the manas. The mind consciousness and the five sense consciousnesses exist to do work on behalf of the manas. If the manas has sufficient wisdom, then whatever the six consciousnesses do, the manas can know it clearly and completely. If the manas lacks sufficient wisdom and its power of determination (adhimokṣa) is not strong either, there will be misunderstandings, or it will fail to understand the ways of the six consciousnesses and be unclear about what the six consciousnesses are doing. If the mind consciousness cannot express itself, or expresses itself unclearly, then the manas cannot fully understand and does not comprehend the mind consciousness's intentions.