This article reports on a study of priming of variable Spanish 1sg subject expression in spontaneous Spanish–English bilingual speech (based on the New Mexico Spanish–English Bilingual corpus, Torres Cacoullos & Travis, in preparation). It displays both within- and cross-language Coreferential Subject Priming; however, cross-language priming from English to Spanish is weaker and shorter lived than within-language Spanish-to-Spanish priming, a finding that seems not to be imputable to lexical boost. Instead, interactions with subject continuity and verb type display that the strength of priming relies on co-occurring contextual features and particular [pronoun + verb] constructions, from the more lexically specific to the more schematically general. Quantitative patterns in speech thus propose insights unavailable from experimental work into the scope and locus of priming effects, proposing that priming in bilingual discourse can serve to measure extents of strength of within- and cross-language associations between usage-based constructions.