The nGY system has 36 languages. Basic density types are (roughly) retained: there are strongly dense (SD) languages in which all syllables are parsed into feet (12 languages are SD); there are weakly dense (WD) languages in which all syllables are parsed into feet except a single syllable in odd-length forms greater than two (12 languages are WD), and there is a class of sparse languages in which each form has either one or two feet depending on a given language’s properties (12 languages are sp). The sparse density type differs from nGX sparse in that nGX sparse languages only permit a single foot in any given form.

A full discussion of the property analysis of nGY is given in The Contours of nGY. This wookbook provides a definition of the system, constraints, violation tableaux, the factorial typology, the 36 grammars of nGY and the full typohedron of nGY along with sub-typohedra organized by density class.