diff --git a/apps/web/components/settings/external-mcp-settings.tsx b/apps/web/components/settings/external-mcp-settings.tsx
index ae15d1c6d3..31913e6eb1 100644
--- a/apps/web/components/settings/external-mcp-settings.tsx
+++ b/apps/web/components/settings/external-mcp-settings.tsx
@@ -70,7 +70,14 @@ export function ExternalMcpSettings() {
         discoveryTargetId={STANDALONE_SETTINGS_TARGETS.externalMcpEndpoints}
         icon={<IconPlugConnected className="h-5 w-5" />}
         title={t("settings:externalMcpEndpoints")}
-        description={t("settings:externalMcpEndpointsDescription")}
+        // `localhost` is a hostname the user types, not copy. Interpolated so
+        // the pseudo-locale leaves it intact — baked into the message it renders
+        // as `ĺōćàĺĥōśţ`, a dead pointer to something the reader must reproduce
+        // verbatim. Same reasoning as `voiceUnavailableInsecure`, which already
+        // passes its scheme and host as values.
+        description={t("settings:externalMcpEndpointsDescription", {
+          localhostHost: "localhost",
+        })}
       >
         <Card>
           <CardHeader>
diff --git a/apps/web/src/locales/en/settings.json b/apps/web/src/locales/en/settings.json
index c8bb95e5f5..ba97c2870d 100644
--- a/apps/web/src/locales/en/settings.json
+++ b/apps/web/src/locales/en/settings.json
@@ -482,7 +482,7 @@
   "externalMcpIntro": "Use this if you want to manage Kandev from coding agents that run <2>outside</2> Kandev (e.g. Claude Code, Cursor, or Codex on your host), or from <4>passthrough agents</4> running inside Kandev.",
   "externalMcpIntroPassthrough": "Agents launched inside Kandev in their normal mode already have the Kandev MCP wired in automatically, no setup needed.",
   "externalMcpEndpoints": "Endpoints",
-  "externalMcpEndpointsDescription": "Available on the same host and port as Kandev. Use localhost for same-machine agents, or the reachable Kandev URL for LAN, VPN, and reverse-proxy clients.",
+  "externalMcpEndpointsDescription": "Available on the same host and port as Kandev. Use {{localhostHost}} for same-machine agents, or the reachable Kandev URL for LAN, VPN, and reverse-proxy clients.",
   "externalMcpStreamableHttp": "Streamable HTTP",
   "externalMcpStreamableHttpHint": "Recommended for Claude Code, Cursor, and Codex.",
   "externalMcpSse": "Server-Sent Events (SSE)",
diff --git a/apps/web/src/locales/pseudo/settings.json b/apps/web/src/locales/pseudo/settings.json
index 6ec388526c..407da6fe28 100644
--- a/apps/web/src/locales/pseudo/settings.json
+++ b/apps/web/src/locales/pseudo/settings.json
@@ -482,7 +482,7 @@
   "externalMcpIntro": "Ũśē ţĥĩś ĩƒ ŷōũ ŵàńţ ţō ḿàńàĝē Ķàńďēv ƒŕōḿ ćōďĩńĝ àĝēńţś ţĥàţ ŕũń <2>ōũţśĩďē</2> Ķàńďēv (ē.ĝ. Ćĺàũďē Ćōďē, Ćũŕśōŕ, ōŕ Ćōďēx ōń ŷōũŕ ĥōśţ), ōŕ ƒŕōḿ <4>ƥàśśţĥŕōũĝĥ àĝēńţś</4> ŕũńńĩńĝ ĩńśĩďē Ķàńďēv.",
   "externalMcpIntroPassthrough": "Àĝēńţś ĺàũńćĥēď ĩńśĩďē Ķàńďēv ĩń ţĥēĩŕ ńōŕḿàĺ ḿōďē àĺŕēàďŷ ĥàvē ţĥē Ķàńďēv ḾĆƤ ŵĩŕēď ĩń àũţōḿàţĩćàĺĺŷ, ńō śēţũƥ ńēēďēď.",
   "externalMcpEndpoints": "Ēńďƥōĩńţś",
-  "externalMcpEndpointsDescription": "Àvàĩĺàƀĺē ōń ţĥē śàḿē ĥōśţ àńď ƥōŕţ àś Ķàńďēv. Ũśē ĺōćàĺĥōśţ ƒōŕ śàḿē-ḿàćĥĩńē àĝēńţś, ōŕ ţĥē ŕēàćĥàƀĺē Ķàńďēv ŨŔĹ ƒōŕ ĹÀŃ, VƤŃ, àńď ŕēvēŕśē-ƥŕōxŷ ćĺĩēńţś.",
+  "externalMcpEndpointsDescription": "Àvàĩĺàƀĺē ōń ţĥē śàḿē ĥōśţ àńď ƥōŕţ àś Ķàńďēv. Ũśē {{localhostHost}} ƒōŕ śàḿē-ḿàćĥĩńē àĝēńţś, ōŕ ţĥē ŕēàćĥàƀĺē Ķàńďēv ŨŔĹ ƒōŕ ĹÀŃ, VƤŃ, àńď ŕēvēŕśē-ƥŕōxŷ ćĺĩēńţś.",
   "externalMcpStreamableHttp": "Śţŕēàḿàƀĺē ĤŢŢƤ",
   "externalMcpStreamableHttpHint": "Ŕēćōḿḿēńďēď ƒōŕ Ćĺàũďē Ćōďē, Ćũŕśōŕ, àńď Ćōďēx.",
   "externalMcpSse": "Śēŕvēŕ-Śēńţ Ēvēńţś (ŚŚĒ)",