Update cheatsheet.en.md

10.temporary-m3p2/16.waves/20.n2/05.waves-introduction/10.waves-in-physics/cheatsheet.en.md

@@ -13,17 +13,17 @@ lessons:
 *Course under construction*, **not validated**. 
 ![](https://m3p2.com/fr/temporary_ins/images/M3P2-validity-state-EN_L1200.jpg)   
 ![](https://m3p2.com/fr/temporary_ins/images/M3P2-maturity-2_L1200.jpg)<details>
-<summary>Etape 2 : Structuration</summary>  
-1. Appel à idées
-2. Structuration 
-3. Ecriture : 1/3
-4. Ecriture : 2/3
-5. Ecriture : 3/3
-6. Relecture 
-7. En test auprès d'étudiants
-8. Validé, encore incomplet
-9. Validé, base suffisante
-10. Validé, opérationnel
+<summary>Stage 2 : In structuring</summary>  
+1. Brainstorming
+2. In structuring
+3. In writing : 1/3
+4. In writing : 2/3
+5. In writing : 3/3
+6. Under review
+7. Tested with students
+8. Validated, still incomplete
+9. Validated, sufficient basis
+10. Validated, operational, in constant improvement
 </details>