I saw a bit of the Twitch stream and it was super inspiring seeing Steph thought process while doing this product. This is really an interesting idea.
I like browsing Eunoia as it gives me the feeling that I'm travelling and discovering new cultures. Foreign languages vocabulary is cool, but it's even cooler when it's words that don't exist in your own tongue. These are meanings you probably wanted to convey at some point but you used 8 words to do that because you didn't have a dedicated idiom. And it gives you perspective on the cultures associated with these languages =)
I know where I'll look next time I stumble upon that kind of word. It's actually pretty fun to just browse the list.