One perceived characteristic of Cajun English (CE) spoken in the state of Louisiana is vowel nasalization, which has been attributed to Cajun French (CF) influence and has been reported in oldest generation Cajuns and young generation Cajun men (DuBois and Horvath, 1998, 2000). Previous research involved only CF-CE bilinguals and sociolinguistic coding based on auditory impressions. In this study, acoustic measures were used to investigate vowel nasalization among both CF-CE bilinguals (the oldest generation) and CE monolinguals. Five bilinguals and five monolinguals completed a word-reading task. In 39 monosyllabic words, four vowels occurred in both oral and nasal environments (CVC, CV, CVN). Nasality measures included bandwidth of F1; the difference between F1’s amplitude and the highest of the first or second harmonic (A1-P0); and the difference between F3’s amplitude and P0 (A3-P0). These were identified as most effective to distinguish oral and nasal vowels (Styler, 2017). Results showed that in comparison to monolinguals, vowels produced by bilinguals were more nasalized in both oral and nasal environments. This suggests that the vowel nasalization may be fading in CE, as it is lessened among young monolinguals. The results are discussed in relation to theories regarding cross-linguistic influence in bilingual communities.One perceived characteristic of Cajun English (CE) spoken in the state of Louisiana is vowel nasalization, which has been attributed to Cajun French (CF) influence and has been reported in oldest generation Cajuns and young generation Cajun men (DuBois and Horvath, 1998, 2000). Previous research involved only CF-CE bilinguals and sociolinguistic coding based on auditory impressions. In this study, acoustic measures were used to investigate vowel nasalization among both CF-CE bilinguals (the oldest generation) and CE monolinguals. Five bilinguals and five monolinguals completed a word-reading task. In 39 monosyllabic words, four vowels occurred in both oral and nasal environments (CVC, CV, CVN). Nasality measures included bandwidth of F1; the difference between F1’s amplitude and the highest of the first or second harmonic (A1-P0); and the difference between F3’s amplitude and P0 (A3-P0). These were identified as most effective to distinguish oral and nasal vowels (Styler, 2017). Results showed that in com...