diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/05.first-steps/textbook.en.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/05.first-steps/textbook.en.md
index e64fc41c1..93abdd1d9 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/05.first-steps/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/05.first-steps/textbook.en.md
@@ -41,9 +41,10 @@ To **add an item, create it** in or after existing items (following the logical
 To do this, start your proposition with a new :     
 * *[BRST-MECCLAS1-number] + (three initials in brackets representing you) + Title*
 
-To **react to an existing item**, add your comment after the others
-starting with three initials in brackets that represent you :
-(CLM): previous comment.<br>
+To **react to an existing item**, add your comment in the text or in the following,
+starting in brackets with your three initials and the 2 letters of your native language.   
+Example :   
+(CLM-FR): previous comment.   
 *(my initials): my comment*