diff --git a/web/frontend/src/components/app-header.tsx b/web/frontend/src/components/app-header.tsx
index 700cc21e..30c05ee4 100644
--- a/web/frontend/src/components/app-header.tsx
+++ b/web/frontend/src/components/app-header.tsx
@@ -294,6 +294,9 @@ export function AppHeader() {
             <DropdownMenuItem onClick={() => i18n.changeLanguage("zh")}>
               简体中文
             </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => i18n.changeLanguage("cs")}>
+              Čeština
+            </DropdownMenuItem>
           </DropdownMenuContent>
         </DropdownMenu>