Update cheatsheet.en.md

12.temporary_ins/69.waves/10.n1/20.overview/cheatsheet.en.md

@@ -21,27 +21,27 @@ $`\def\PSopen{\mathscr{S}_{\smile}}`$
 $`\def\PSclosed{\mathscr{S}_{\displaystyle\tiny\bigcirc}}`$
 -->
 
-*Cours en construction*, **non validé**.    
-![](https://m3p2.com/fr/temporary_ins/images/M3P2-validity-state-FR_L1200.jpg)   
+*Lecture 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-1_L1200.jpg)<details>
-<summary>Etape 1 : Appel à idées</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 1 : Brainstorming</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>
 
-##### Randonnée Colline
+##### Walk across the plain
 
 ---------------------------
 
-### Waves
+### Discovering the waves