This document discusses different parameters of language variation including geographical location, social domain, range of speaker competence, social segregation, L1 background diversity, gender, academic discipline, and accessibility of speakers. It provides examples of linguistic variations in dialects of the Madurese language, registers used in religious and workplace settings, code-mixing in Indonesian, gender differences in language, academic jargon, and gay language terminology in Indonesia. References are listed at the end from sources on linguistics and anthropology.