YouthYouths, standard non-verbal, expressesexpress their age and mental characteristics. ButHowever, if this phenomenon is over, it negatively affects the culture of the language and the future of evolution. Generation-specific language, then, can be assumed to reflect sound changes in progress. Lexical and syntactic changes, on the other hand, do not seem to spread through the community in the same way. A common pattern for lexical change is for all members of the community to change their frequencies of use together, or to acquire new forms simultaneously (Labov 1994, 84; see, for example, Payne 1976).