diff --git a/nginx.conf b/nginx.conf
index 73deeb1..f889dc8 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -4,6 +4,21 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
+    # Serve text responses as UTF-8. Without this nginx omits the charset and
+    # browsers fall back to a locale guess (Windows-1252 on DE systems), which
+    # turns valid UTF-8 in llms.txt / robots.txt into mojibake (â€", für).
+    charset utf-8;
+    charset_types text/plain text/css text/xml application/javascript application/json image/svg+xml;
+
+    # AI-discovery files (llms.txt, robots.txt): always served as UTF-8 plain
+    # text, never swallowed by the clean-URL fallback, and readable cross-origin
+    # so any AI crawler or tool can fetch them.
+    location ~* \.txt$ {
+        try_files $uri =404;
+        default_type text/plain;
+        add_header Access-Control-Allow-Origin "*" always;
+        add_header Cache-Control "public, max-age=3600" always;
+    }
 
     # Serve clean URLs by trying $uri, then $uri.html
     location / {