diff --git a/Devrules.md b/Devrules.md
index 3b91846..1992e34 100644
--- a/Devrules.md
+++ b/Devrules.md
@@ -75,24 +75,39 @@ Initialize a developer branch, each developer must create and checkout a new bra
 * A **request** is send with specific header to be accepted.
   ```
   {
-    xauth: 'jwt token 24hours valid or 1 if not authenticated',
-    xpaganid: 'uuid of the connected user'
+    xjwt: 'jwt token 24hours valid or 1 if not authenticated',
+    xpseudo: 'uuid of the connected user'
     xlang:' lang international notification 2 letters of the request',
-    xtribe: 'name of the tribe, xpaganId belongs to',
-    xworkon: 'name of tribe user want to act if accessrights are properly set up',
-    xapp: 'name of app requesting action "tribename:nappname" if accessrights are set up'
+    xtribe: 'name of the tribe, xpseudo have acces right',
+    xapp: 'name of app requesting action "" if accessrights are set up'
   }
   ```
 * A **response** is structured as 
   ```
   {
-    status: mandatory Integer,(web status code)[https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml]
+    status: mandatory Integer,(web status code)
     info: optional string,
     data: optional object 
   }
+  
+  Code list [https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml]
+  
   ```
 * **Multilanguage management** depending of header.xlang request
-    - info:"|model|key" starting by | mean a file is available in ./nationchains/static/info/model_lg.json to match {key:"information in language lg}
+  ```
+  /folder/
+         /lg/
+            action_lg.json
+         action.js
+   
+   action_lg.json={"keyword":"a mustache string in lg language"}
+   
+   a return action.js ret = {status, ref:action, info:keyword, data:object} 
+   
+  ```
+  in client site => you can manage return with  mustache.render([ret.ref]_[xlang].json[ret.info],ret.data)
+
+Any lg/action_lg.json is accessible from url: 
   
 ### apXtrib Coding Convention