This treatise primarily concerns the Psychopathology of Speech and Language with particular emphasis on Dyslexia as it manifests in the multilingual environment of the new era and in relation to the Learning Styles that characterize each child. Among other things, it discusses the correlations of language with basic cognitive parameters that reside in the brain, such as higher mental abilities like thinking, memory, creativity, etc., as well as with other forms of human expression such as communication, humor, culture, medical clinical practice, emotion, etc. Emphasis is also placed on the role of today's educator, speech therapist, and other involved parties (i.e., specialized support professionals, parents, etc.) in addressing it in the inclusive general school.