I just found out about using a translation plugin as a way to change words across your theme.
Many themes will come with words coded in many areas – “Read more” is one that comes to mind, or maybe a set category or a variety of things. And you can often change these with CSS but you often won’t find all the places.
But, I just used Loco Translate to make a change! You can just search for the word and then change it, and it “translates” it. It was so easy! (I will say, this isn’t what I’d recommend trying first, but there are times for it.)
Anyway, here’s a video showing how for the theme I’m using.