The lessons include studying vocabulary and grammar. It includes guidelines for teaching phonemic awareness, phonics, fluency, vocabulary and comprehension. Language is taught through dialogues with useful vocabulary and common structures of communication. The lessons reiterate simple vocabulary and grammatical tenses. Dictionaries categorize a language's lexicon (i.e., its vocabulary) into lemmas. Many are close enough in terms of vocabulary and grammar to be mutually intelligible. Neo-Aramaic languages that retain some Akkadian vocabulary and grammatical features. Lexicography involves the documentation of words that form a vocabulary. Each type of speech has its own vocabulary and verb endings. These are the only languages known to have clicks in normal vocabulary. Dialects typically differ in terms of pitch accent, inflectional morphology, vocabulary, and particle usage. The phrase became part of the American vocabulary. This is based on sound correspondences in the basic vocabulary and morphological parallels. Many terms were transliterated directly and added to the Chinese vocabulary. Latin continues to be used to form international scientific vocabulary and classical compounds.