Conradh na Gaeilge
Heusaff and his wife were members of Conradh na Gaeilge and involved in Na Teaghlaigh Ghaelacha, an organisation for Irish speaking families. Bríd became a member of the Executive of Conradh na Gaeilge and was very active in Irish language activities. Heusaff took part in Irish language campaigns such as Cearta Sibhialta na Gaeltachta and was the first person to refuse, on principle, to pay a television licence because of Raidió Teilifís Éireann's (RTÉ) neglect of Irish language programmes. This campaign ultimately resulted in the establishment of Teilifís na Gaeilge (later TG4) in 1996.