Previous research on the phonetics and phonology of code-switching has largely focused on word internal phenomenon, such as voice onset time. However, many phonological processes occur across word boundaries, and in the case of code-switching, potentially across language boundaries. This study examines the application of phonological rules across word and language boundaries in cases of code-switching, exploiting cross-linguistic differences in voicing assimilation and spirantization processes in English and Spanish. Results from an oral production paradigm conducted with Spanish–English bilinguals showed an asymmetrical impact of code-switching: switched and non-switched tokens differed in Spanish, but not English. A similar pattern was found for bilinguals of different language dominance profiles. This asymmetry is discussed with respect to the different language-specific degrees of variability in production. Moreover, results from the current study suggest that while phonological processes may be anchored to language-specific lexical items or phonemes, the licensing environment is language non-specific.

先前对代码转换的语音和语音学的研究主要集中在单词内部现象，例如语音开始时间。但是，许多语音过程跨越单词边界发生，并且在代码切换的情况下，可能跨越语言边界发生。这项研究探讨了语音规则在单词和语言转换中跨语言和语言边界的应用，并利用英语和西班牙语在发声同化和美化过程中的跨语言差异。用西班牙语-英语双语者进行的口头制作范例的结果显示了代码转换的非对称影响：西班牙语和英语中的交换令牌和非交换令牌有所不同。对于不同语言优势的双语者也发现了类似的模式。关于生产中不同语言特定程度的可变性讨论了这种不对称性。此外，当前研究的结果表明，虽然语音过程可能与特定语言的词汇项目或音素相关，但许可环境却是非特定语言的。