<p>Offering multilingual options on health websites is crucial, as it facilitates access to online health information for immigrants and ethnic minorities. In response to the necessity of research in this field and the growing scholarly interest, this study reviewed recent empirical studies on the multilingual accessibility of health websites to offer methodological insights into this research field while highlighting existing research gaps. Three databases, namely, Web of Science, PubMed, and CINAHL, were searched for studies published between 1 March 2014 and 1 March 2024. Fifty-three eligible studies were included. Data were extracted from nine dimensions and synthesized to address four research questions: conceptual orientations, research gaps, research pathways, and website selection methods. The data synthesis revealed that: (i) research gaps exist, particularly with COVID-19 as the predominant health topic; (ii) the reviewed studies were geographically focused on only 12 regions, with the United States receiving the most extensive attention (54.5%); (iii) only 16 studies (30.2%) specifically targeted immigrants or ethnic minorities; (iv) only five different languages appeared as source languages of the studied websites, and 86.8% of studies focused on websites originally prepared in English; and (v) common criteria for evaluating multilingual accessibility included the presence of multilingual options, languages offered, translation methods, and the quantity of multilingual information. This review offers insights into the research gaps and methodologies for evaluating the multilingual accessibility of health websites. Future studies could focus on empirical research across diverse health websites, regions, and language pairs. A ready-to-use checklist of criteria for evaluating multilingual accessibility is needed.</p>