FEAT #13339 TIME 0:20 fix var lang

...ontact/contact-duplicate/contact-duplicate.component.html

.../contact/contact-duplicate/contact-duplicate.component.ts

.../contact/group/contacts-group-administration.component.ts

...contact/group/contacts-groups-administration.component.ts

...on/contact/list/contacts-list-administration.component.ts

...on/contact/page/contacts-page-administration.component.ts

...ion/customField/custom-fields-administration.component.ts

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts