FEAT #8805 add internationalization functionality

package.json

src/frontend/app/app.component.ts

src/frontend/app/app.module.ts

src/frontend/app/profile/profile.component.html

src/frontend/app/profile/profile.component.ts

src/frontend/app/service/notification.service.ts

src/frontend/assets/i18n/en.json

src/frontend/assets/i18n/fr.json