This chapter discusses selected studies of orthography that focus on the spelling practices by mere users of the language (in crucial opposition to actors from the literate elite – norm makers), concentrating on what they reveal about processes of language change as exemplified by spelling variation. The chapter supports the idea that, within the field of historical sociolinguistics, orthographic variables are now considered a type of linguistic variables. The author shows, on the basis of specific historical sociolinguistic studies, that writers’ variable choices of orthography can inform us about broader mechanisms of language change, but always alongside other types of variation or linguistic information. This chapter examines almost exclusively material from the French language, with the studies under consideration addressing either regional French in France or different varieties of French in Canada. The author situates French orthographic variables within the broader language evolution context, explicating what information spelling variation discloses about the writer’s attitudes toward the (written or spoken) norm, toward the written form, and toward the writer’s linguistic community as a whole. The author also considers how spelling variation compares to other types of language variation in order to contribute to a greater understanding of language change.