diff --git a/src/app/(dashboard)/dashboard/endpoint/EndpointPageClient.js b/src/app/(dashboard)/dashboard/endpoint/EndpointPageClient.js
index b3a957a6..71e6012a 100644
--- a/src/app/(dashboard)/dashboard/endpoint/EndpointPageClient.js
+++ b/src/app/(dashboard)/dashboard/endpoint/EndpointPageClient.js
@@ -4,6 +4,10 @@ import { useState, useEffect, useRef, useCallback } from "react";
 import PropTypes from "prop-types";
 import { Card, Button, Input, Modal, CardSkeleton, Toggle, ConfirmModal } from "@/shared/components";
 import { useCopyToClipboard } from "@/shared/hooks/useCopyToClipboard";
+import { getCurrentLocale, onLocaleChange } from "@/i18n/runtime";
+
+// Locales that unlock wenyan (classical Chinese) caveman levels
+const WENYAN_LOCALES = ["zh-CN", "zh-TW"];
 
 const TUNNEL_BENEFITS = [
   { icon: "public", title: "Access Anywhere", desc: "Use your API from any network" },
@@ -53,9 +57,9 @@ const CAVEMAN_LEVELS = [
   { id: "lite", label: "Lite", desc: "Drop filler, keep grammar" },
   { id: "full", label: "Full", desc: "Drop articles, fragments OK" },
   { id: "ultra", label: "Ultra", desc: "Telegraphic, max compression" },
-  { id: "wenyan-lite", label: "Zip Lite", desc: "Compact classical style, light compression" },
-  { id: "wenyan", label: "Zip Full", desc: "Classical Chinese, 80-90% token reduction" },
-  { id: "wenyan-ultra", label: "Zip Max", desc: "Extreme classical compression" },
+  { id: "wenyan-lite", label: "文 Lite", desc: "Classical Chinese, light compression", wenyan: true },
+  { id: "wenyan", label: "文 Full", desc: "Maximum 文言文, 80-90% reduction", wenyan: true },
+  { id: "wenyan-ultra", label: "文 Ultra", desc: "Extreme classical compression", wenyan: true },
 ];
 export default function APIPageClient({ machineId }) {
   const [keys, setKeys] = useState([]);
@@ -72,6 +76,7 @@ export default function APIPageClient({ machineId }) {
   const [rtkEnabled, setRtkEnabledState] = useState(true);
   const [cavemanEnabled, setCavemanEnabled] = useState(false);
   const [cavemanLevel, setCavemanLevel] = useState("full");
+  const [locale, setLocale] = useState("en");
 
   // Cloudflare Tunnel state
   const [tunnelChecking, setTunnelChecking] = useState(true);
@@ -127,6 +132,26 @@ export default function APIPageClient({ machineId }) {
       setIsRemoteHost(!["localhost", "127.0.0.1", "::1"].includes(window.location.hostname));
   }, []);
 
+  // Track app UI locale to gate wenyan caveman levels
+  useEffect(() => {
+    setLocale(getCurrentLocale());
+    return onLocaleChange(() => setLocale(getCurrentLocale()));
+  }, []);
+
+  const isWenyanLocale = WENYAN_LOCALES.includes(locale);
+  const visibleCavemanLevels = isWenyanLocale
+    ? CAVEMAN_LEVELS
+    : CAVEMAN_LEVELS.filter((lvl) => !lvl.wenyan);
+
+  // Reset wenyan level to "ultra" when leaving a Chinese locale
+  useEffect(() => {
+    const current = CAVEMAN_LEVELS.find((lvl) => lvl.id === cavemanLevel);
+    if (current?.wenyan && !isWenyanLocale) {
+      setCavemanLevel("ultra");
+      patchSetting({ cavemanLevel: "ultra" });
+    }
+  }, [isWenyanLocale, cavemanLevel]);
+
   const { copied, copy } = useCopyToClipboard();
 
   // Security gate: block remote exposure while dashboard uses default password or login is off.
@@ -1080,7 +1105,7 @@ export default function APIPageClient({ machineId }) {
             {cavemanEnabled && (
               <div className="flex flex-col items-end gap-1">
                 <div className="flex items-center gap-1.5">
-                  {CAVEMAN_LEVELS.map((lvl) => (
+                  {visibleCavemanLevels.map((lvl) => (
                     <button
                       key={lvl.id}
                       onClick={() => handleCavemanLevel(lvl.id)}