Make strings translatable

cartable.php

@@ -377,6 +377,8 @@ function cartable_get_membership_vars($vars){
         ],
         'i18n' => [
             'dateformat' => 'dd MM',
+            'my_contribution' => E::ts('My Contribution'),
+            'your_salary_tax_free' => E::ts('Your monthly salary, tax free'),
         ]
     ];
     if(civicrm_api3('Setting', 'getvalue', [

src/js/membership.js

@@ -101,7 +101,7 @@ const cartable_reset_membership_amount = function(){
     MembershipSelector.append(
         CRM.$('<h3>')
         .addClass('cartable-title cartable-membership-title')
-        .text('My contribution')
+        .text(cartable.Membership.i18n.my_contribution)
     );
 
     MembershipSelector.append(
@@ -113,7 +113,7 @@ const cartable_reset_membership_amount = function(){
     MembershipSelector.append(
         CRM.$('<h3>')
         .addClass('cartable-title cartable-membership-salary-title')
-        .text('Your monthly salary, tax free')
+        .text(cartable.Membership.i18n.your_salary_tax_free)
     );
 
     SalarySelect = CRM.$('<select>')