On 14 January 2014, Copeland was named in the preliminary 44-man squad for the 2014 Six Nations Championship. He made his debut for Ireland Wolfhounds when he started for them in their friendly against England Saxons on 25 January 2014. On 27 January 2014, Copeland was named in Ireland's 34-man squad for the opening two fixtures of the 2014 Six Nations Championship. Copeland was selected in the Emerging Ireland squad on 26 May 2014. He started against Russia in their first 2014 IRB Nations Cup match on 13 June 2014, scoring a try. Copeland came off the bench in their second game against Uruguay on 18 June 2014. He started in the 31–10 win Romania on 22 June 2014, scoring a try in the win that secured the 2014 IRB Nations Cup for Emerging Ireland. Copeland was named Player of the Tournament for the 2014 IRB Nations Cup. Copeland made his senior debut for Ireland on 16 November 2014, coming off the bench in the 49–7 win against Georgia during the 2014 November Tests.