This study investigated the electrophysiological correlates of cross-language orthographic and phonological processing in unbalanced Chinese (L1)–English (L2) bilinguals using a translation recognition task. The critical L1-L2 word pairs were incorrect translation equivalents but orthographically or phonologically related through translation (orthographic or phonological translation neighbor). Compared with the unrelated control, the recognition of L2 words showed comparable reaction time and accuracies when coupled with L1 orthographic or phonological translation neighbors. However, both orthographic and phonological translation neighbors elicited more negative event-related potential (ERP) waveforms in the bulk of the N400 component (300-600 ms) than the unrelated control. These findings were interpreted in the framework of the Bilingual Interactive Activation Plus model (BIA+ model), according to which cross-language orthographic and phonological representations were non-selectively accessed during the recognition of the L2 words, and top-down inhibitory control mechanism impacted the cross-language lexical competition and confliction between the two languages.

The current study examined within- and cross-language connectivity in four priming conditions: repetition, translation, within-language semantic and cross-language semantic priming. Unbalanced Hebrew–English bilinguals (N = 89) completed a lexical decision task in one of the four conditions in both languages. Priming effects were significantly larger from L1 to L2 for translation priming and marginally so for cross-language semantic priming. Priming effects were comparable for L1 and L2 in repetition and within-language semantic priming. These results support the notion that L1 words are more effective primes but also that L2 targets benefit more from priming. This pattern of results suggests that the lower frequency of use of L2 lexical items in unbalanced bilinguals contributes to asymmetrical cross-language priming via lower resting-level activation of targets and not only via less efficient lexical activation of primes, as highlighted by the BIA+ model.

The current study investigated whether Russian–English bilinguals activate knowledge of Russian when reading English sentences. Russian and English share only a few letters, but there are some interlingual homographs (e.g., POT, which means “mouth” in Russian). Critical sentences were written such that the Russian meaning of the homographs fit the context. Sentences presented to participants contained either the English translation of the Russian meaning of a homograph, an interlingual homograph, or a control word (e.g., TO SEE TOM'S THROAT, THE DOCTOR ASKED TOM TO OPEN HIS MOUTH/POT/NET WIDELY). Bilinguals showed a reduction in the N400 component of the event-related potential (ERP) signal for interlingual homographs compared to control words, whereas the N400 of monolingual English speakers was of a similar magnitude in the two conditions. The finding provides evidence that bilinguals automatically activate representations in both of their languages when reading in one language, even when the combination of a language-specific script and the preceding language context indicates that the other language is not relevant.