In this chapter, Vann describes his framework for longitudinal quantitative analysis of sociolinguistic survey data (N = 34). The data represent relative ideologies toward Catalan and Spanish language, identity, and nationalism in relation to the linguistic habitus and language socialization patterns in 1995 and 2017. These survey data lead Vann to document contemporary communicative ecologies during language shift. These ecologies depend on local languaging that demonstrates emergent coding with variable states of lexical meaning. In this milieu, Vann describes the construction of variables that may predict community ideologies, including participants’ gender identifications, their childhood exposures to Catalan and Spanish, their individual social ties in 1995, and their community-level social ties in 1995 and 2017. The chapter concludes with an elaboration of research hypotheses.