fix: do not load translation files for Lechapt-Calmon calculor (now, it's a child nub)

refs #585

src/app/services/internationalisation.service.ts

@@ -62,7 +62,8 @@ export class I18nService extends Observable implements Observer {
     public async setLanguage(code: string) {
         /** excluded calculators */
         const childCalculatorType: CalculatorType[] = [
-            CalculatorType.Section, CalculatorType.Structure, CalculatorType.CloisonAval, CalculatorType.YAXN
+            CalculatorType.Section, CalculatorType.Structure, CalculatorType.CloisonAval, CalculatorType.YAXN,
+            CalculatorType.LechaptCalmon
         ];
 
         // ensure 2-letter language code