Recent work has demonstrated how disparate information on available neighborhoods and housing units leads to racially distinct patterns of residential mobility and ultimately reproduces residential segregation. In this this talk I will describe a novel source of information about neighborhoods that does not violate Fair Housing Laws — the use of Spanish language text in online rental housing advertisements — and examine the impact of Spanish text on White, Black, and Latinx Americans’ residential choices. First, using a corpus of millions of Craigslist advertisements for rental housing, I will show that the use of Spanish text is concentrated in advertisements for housing in majority-Latinx neighborhoods with greater proportions of immigrant residents, as well as neighborhoods with growing Black populations. I will then use a survey experiment to demonstrate how the use of Spanish text decreases White and Black Americans’ overall interest in a potential housing unit while increasing their perceptions that the surrounding neighborhood is heavily Latinx and immigrant. While Latinx Americans’ also interpret Spanish as a signal of Latinx and immigrant neighborhood concentration, Spanish usage does not diminish their interest in the housing unit. Altogether, these findings identify a novel mechanism that may contribute to Latinx residential segregation in the United States and demonstrate the value of combining ‘big’ data with survey experiments.