<p>This study identifies a novel factor influencing differences in subjective well-being: the form of gender marking in language. Drawing on data from the World Values Survey (WVS), UNdata, and the World Atlas of Language Structures (WALS) for 44 countries (with over 74,000 respondents), this study investigates whether variation in grammatical gender intensity is systematically associated with women’s subjective well-being. Using multilevel models that account for the hierarchical structure of the data, we find that higher grammatical gender intensity is associated with lower subjective well-being among women. However, the adverse impacts of gendered language on the subjective well-being of women can be mitigated to some extent for those who are employed, have middle and high incomes, and possess higher levels of education. We further find that more gender-intensive languages are associated with less egalitarian gender-role beliefs, which are in turn associated with lower subjective well-being among women. This suggests gender beliefs as a potential associative pathway linking grammatical gender intensity and women’s subjective well-being. These findings underscore the nexus between gendered language and beliefs concerning gender roles, thereby providing substantiation for part of the Linguistic Relativity Hypothesis (LRH), which posits that language exerts an influence on both thought and cognition.</p>