diff --git a/high-level-tests/e2e-playwright/pages/pix-app/CertificationAccessCodePage.ts b/high-level-tests/e2e-playwright/pages/pix-app/CertificationAccessCodePage.ts
index 8e9f83918f5..6aa2c936984 100644
--- a/high-level-tests/e2e-playwright/pages/pix-app/CertificationAccessCodePage.ts
+++ b/high-level-tests/e2e-playwright/pages/pix-app/CertificationAccessCodePage.ts
@@ -8,9 +8,6 @@ export class CertificationAccessCodePage {
     const languageDropdown = this.page.getByRole('button', { name: 'Langue de certification' });
 
     if (await languageDropdown.isVisible()) {
-      await languageDropdown.click();
-      await this.page.getByRole('option', { name: 'français - FR' }).click();
-
       const languageConfirmationCheckbox = this.page.getByRole('checkbox', {
         name: /Je confirme être à l'aise dans la langue sélectionnée/,
       });
diff --git a/mon-pix/app/components/certification-starter.gjs b/mon-pix/app/components/certification-starter.gjs
index 8adee793ac7..9e31b63fb6d 100644
--- a/mon-pix/app/components/certification-starter.gjs
+++ b/mon-pix/app/components/certification-starter.gjs
@@ -43,6 +43,13 @@ export default class CertificationStarter extends Component {
     : VALID_CERTIFICATION_LOCALES.FRENCH_FRANCE;
   @tracked hasCandidateConfirmedLanguage = !this._isOrgDomain;
 
+  get _certificationLocale() {
+    if (this._isOrgDomain && this.args.model.certificationCandidate.hasPixPlusSubscription) {
+      return VALID_CERTIFICATION_LOCALES.FRENCH_FRANCE;
+    }
+    return this.selectedLanguage;
+  }
+
   get accessCode() {
     return this.inputAccessCode.toUpperCase();
   }
@@ -134,7 +141,7 @@ export default class CertificationStarter extends Component {
     const newCertificationCourse = this.store.createRecord('certification-course', {
       accessCode: this.accessCode,
       sessionId: this.args.model.certificationCandidate.sessionId,
-      locale: this.selectedLanguage,
+      locale: this._certificationLocale,
     });
     try {
       await newCertificationCourse.save();
diff --git a/mon-pix/tests/integration/components/certification-starter-test.gjs b/mon-pix/tests/integration/components/certification-starter-test.gjs
index 1d46bc3f8df..0687278a067 100644
--- a/mon-pix/tests/integration/components/certification-starter-test.gjs
+++ b/mon-pix/tests/integration/components/certification-starter-test.gjs
@@ -351,6 +351,43 @@ module('Integration | Component | certification-starter', function (hooks) {
         assert.ok(certificationCourse.save.calledOnce);
       });
 
+      test('should submit with fr-fr locale when candidate has a Pix+ subscription on org domain', async function (assert) {
+        // given
+        const certificationCourse = {
+          id: '456',
+          save: sinon.stub(),
+          deleteRecord: sinon.stub(),
+        };
+
+        const createRecordStub = sinon.stub().returns(certificationCourse);
+
+        class StoreServiceStub extends Service {
+          createRecord = createRecordStub;
+        }
+
+        this.owner.register('service:store', StoreServiceStub);
+
+        stubFranceDomain(this.owner, false);
+
+        model = {
+          certificationCandidate: { hasStartedTest: false, sessionId: 123, hasPixPlusSubscription: true },
+        };
+        const screen = await renderComponent();
+        await fillAccessCode(screen, 'ABC123');
+        await confirmLanguageSelection(screen);
+
+        // when
+        await submitForm();
+
+        // then
+        sinon.assert.calledWithExactly(createRecordStub, 'certification-course', {
+          accessCode: 'ABC123',
+          sessionId: 123,
+          locale: 'fr-fr',
+        });
+        assert.ok(true);
+      });
+
       module('when the creation of certification course is in error', function (hooks) {
         hooks.beforeEach(function () {
           class RouterServiceStub extends Service {