add quick note for how to extract module in ReadMe

README.md

@@ -1,3 +1,16 @@
 # thea2Shattering_i18n_tools
 
-Scripting tools to interact with Thea 2 The Shattering's files in order to translate them easily.
+Scripting tools to interact with Thea 2 The Shattering's files in order to translate them easily.
+
+
+
+## Modules
+
+To convert from txt :
+
+```
+for text in Modules/game_files/*; do ./extract_module.sh "${text}"; done
+
+for text in Modules/pot/*; do mv "${text}" "${text}.ori"; msguniq --no-wrap "${text}.ori" > "${text}"; rm "${text}.ori"; done
+```
+