In some contact situations between Spanish and English there is an acceleration of the process of the extension of "estar" that may be due to lack of access to the formal written standard, features of English in particular or general processes of simplification that result from the cognitive demands of bilingualism (Silva-Corvalan, 1994). In our large-scale analysis of data from a contextualized preference task collected in four areas of the lberian Peninsula where Spanish is in contact with a regional language (Basque, Catalan, Galician and Valencian) and in monolingual regions of Spain, we identify differences in the numbers of unanimous responses, and frequency and predictors of "estar" selection across populations. We show that more frequent selection of "estar" is not a characteristic of all bilingual groups, and several linguistic predictors of "estar" are common to all groups. Additionally, we find that more frequent selection of "estar" occurs in some varieties even among bilinguals with ample access to the formal standard.