diff --git a/quartz/components/Comments.tsx b/quartz/components/Comments.tsx
index 0bfd82d2d..a7315214f 100644
--- a/quartz/components/Comments.tsx
+++ b/quartz/components/Comments.tsx
@@ -17,6 +17,7 @@ type Options = {
     strict?: boolean
     reactionsEnabled?: boolean
     inputPosition?: "top" | "bottom"
+    lang?: string
   }
 }
 
@@ -50,6 +51,7 @@ export default ((opts: Options) => {
         data-theme-url={
           opts.options.themeUrl ?? `https://${cfg.baseUrl ?? "example.com"}/static/giscus`
         }
+        data-lang={opts.options.lang ?? "en"}
       ></div>
     )
   }
diff --git a/quartz/components/scripts/comments.inline.ts b/quartz/components/scripts/comments.inline.ts
index c54230fbe..2b876bf6b 100644
--- a/quartz/components/scripts/comments.inline.ts
+++ b/quartz/components/scripts/comments.inline.ts
@@ -55,6 +55,7 @@ type GiscusElement = Omit<HTMLElement, "dataset"> & {
     strict: string
     reactionsEnabled: string
     inputPosition: "top" | "bottom"
+    lang: string
   }
 }
 
@@ -78,7 +79,7 @@ document.addEventListener("nav", () => {
   giscusScript.setAttribute("data-strict", giscusContainer.dataset.strict)
   giscusScript.setAttribute("data-reactions-enabled", giscusContainer.dataset.reactionsEnabled)
   giscusScript.setAttribute("data-input-position", giscusContainer.dataset.inputPosition)
-
+  giscusScript.setAttribute("data-lang", giscusContainer.dataset.lang)
   const theme = document.documentElement.getAttribute("saved-theme")
   if (theme) {
     giscusScript.setAttribute("data-theme", getThemeUrl(getThemeName(theme)))