Lexical languages and grammar languages
Grammar and lexicon are the two principal forms of linguistic description. Their difference is related to the structure of the human psycholinguistic mechanism. It consists of a set of units (vocabulary) and rules of their combination (syntactic rules) and modification (morphological rules). The ratio of these components depends on the type of language and is reflected in the traditional differentiation of inflected, agglutinative and amorphous languages. Amorphous languages are the most lexical, and inflected languages are the most grammatical in their linguistic description.