Faroese language
Zachariasen took an active part in the Faroese language conflict. He and others worked for the right to use the Faroese language in all official matters. He had a degree as a school teacher, but he refused to teach the Faroese children in the Danish language, as the law ordered him to do. He therefore stopped working as a teacher in protest and moved to Denmark for some years in order to get further education. He also took an active part in the Faroese language conflict by writing poems, plays, novels and other texts in Faroese.