How to translate credits line in the footer?

Hello, I am using Decree Free theme for my brother's web site. The site will be multilingual (not yet) but now it is in Turkish. I'd like to know is there any way to translate the footer credits to Turkish? Copyright © 2018 Özen – Çeltikci Avukatlık Bürosu. All Rights Reserved | Decree by Catch Themes this line needs to be translated. Thank you... Yener