It would be nice to have a gradual highlighting of the differences.

Ever considered to add the Greek text?

It looks like the Greek text is there. You have to click "Compare Translations" on the top left -> Top Result.

Very nice. I missed that, because I expected that "Compare Translations" would highlight differences and thus did not check it out.

For sure. I found it by mistake. I was just trying to get to the homepage by clicking the menu icon.

Oops. Any idea how to make the UX better?

No worries! For UX, I would personally add the Greek text by default, and remove the hamburger icon from "Compare Translations". I don't know, my brain is trained to see that icon strictly as a site navigation item.

If you wanted to, perhaps at the top of the page, you can add <select> tags for the translations.

But after figuring out what everything is doing, it's a super nice project; I like it, no need to change anything (above are just suggestions). Thank you for putting it together!

Wow, instant bookmark. Thanks!