FEAT #8805 Translate modal field

src/frontend/app/modal/confirm-modal.component.html

src/frontend/app/modal/confirm-modal.component.ts

src/frontend/app/modal/reject-info.component.ts

src/frontend/app/modal/reject-info.html

src/frontend/app/modal/success-info-valid.component.ts

src/frontend/app/modal/success-info-valid.html

src/frontend/app/modal/warn-modal.component.html

src/frontend/app/modal/warn-modal.component.ts

src/frontend/assets/i18n/en.json

src/frontend/assets/i18n/fr.json