Introduction. Research suggests that generational status and acculturation influence dietary behaviors among Latinos. The goal of this study was to assess the relationship between language preference (English vs. Spanish) and (1) trends in dietary quality, fruit/vegetable, and sugar sweetened beverage intake and (2) differences in dietary outcomes among SNAP-Ed eligible mother/child Latinx pairs. Methods. Representative cross-sectional samples of low-income mother/child pairs were collected by telephone survey between 2014 and 2017. The Automated Self-administered 24 hour Recall (ASA24) captured dietary behaviors. Race/ethnicity, highest level of education, and age also were also recorded. Surveys were administered in English or Spanish based on respondent preference. Three dietary outcome variables were examined: (1) cups of fruits and vegetables; (2) cups of sugar-sweetened beverages (SSBs); and (3) HEI-2015 scores. A repeated measures approach was used to model differences among Latina mothers and their children by preferred language. Results. A total of 6,209 Latinx mother/child pairs participated in the study. Pairs responding in Spanish had significantly higher HEI scores than those choosing English (59 compared to 54). Within pair differences in measures of HEI and fruit and vegetable consumption were smaller among pairs responding in English. Between and within pair differences were also observed in relation to meals from school cafeterias, family dinners, and fast food. Discussion. Delineating differences in nutritional quality and consumption among Latinos may be important strategically for SNAP-Ed programs in California. The present findings suggest that language preference explains variation in nutritional quality and consumption over time among mother/child pairs.