diff --git a/src/lib/app/error.ts b/src/lib/app/error.ts
index fef23eeb..50eb49b2 100644
--- a/src/lib/app/error.ts
+++ b/src/lib/app/error.ts
@@ -27,6 +27,11 @@ export function errorMessage(error: any, instance?: string): string {
     }
     if (!error) throw error
 
+    // Only key-shaped messages (error codes like "couldnt_find_post") can be
+    // translation keys — free-text messages would just make t.get log a
+    // missing-translation warning on every error page.
+    if (!/^[\w-]+$/.test(String(error))) return String(error)
+
     // t.get returns the key itself when no translation exists — fall back
     // to the raw error message instead of showing "error.<message>"
     const key = `error.${error}`