Update textbook.fr.md

00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/30.en/textbook.fr.md

@@ -62,5 +62,11 @@ For the level: https://m3p2.com/fr/brainstorming-pedagogical-teams/synthesis-str
 The Gitlab will be kept up to date with your proposals, also translated into English and Spanish.    
 _(This is not required, but if you can also make your contribution in French, more in_
 _English or Spanish, this will ease the translation work) ._    
-This page at this level can be viewed in a multilingual version at :    
-https://m3p2.com/polyglot/brainstorming-pedagogical-teams/synthesis-structuring/electromagnetism/n1 
+
+* This page can be viewed in a multilingual version at:
+    * https://m3p2.com/fr/lessons/define-g-mathematical-tools-polyglot
+and each level in multilingual version at:
+    * level 1: https://m3p2.com/fr/lessons/define-1-mathematical-tools-polyglot
+    * level 2: https://m3p2.com/fr/lessons/define-2-mathematical-tools-polyglot
+    * level 3: https://m3p2.com/fr/lessons/define-3-mathematical-tools-polyglot
+    * level 4: https://m3p2.com/fr/lessons/define-4-mathematical-tools-polyglot