Button language cannot be change!

Hi,
I am using opencart v. 2.3.0.2 and using journal theme at www.demirkayaoptik.com
I have edited and changed everyting on the web site but I could not change "read more" button to turkish version "devamını oku".
As you can see here: https://www.demirkayaoptik.com/blog the button should be "Devamını Oku" not "Read more". Do know what I mean?

It's related to your Blog extension. If it's a part of your theme, then look in related language file or theme settings.