The Language of Sly Tongues

Language B, a.k.a. the Mad Scientist of Language, has hijacked the English language and alphabet to create The Language of SLY Tongues a. k. a. The LOST Sly Code. Assisted by imaginary friends, Language A and B-Ker-Buttinski, Language B, explains the concept and process of The Language of sly Tongues, reveals how the word sly has been semantically hiding out in the English language, the sly pattern within the sly wordlist, psychologically battles B-Ker-Buttinski, and then poses a sly question to all. Mirror, mirror on the wall. Who has the slyest tongues of all?