Didn't know that! Can you upload custom dictionaries to them? That was my only gripe with how Kindles do it - they support this feature in some languages but not others.

Yeah it's possible but it's not an official feature (it's not hard though).

What are you talking about? It's built right into the Kobo reader, and has been for years. https://help.kobo.com/hc/en-us/articles/360017639893-Define-...

The dictionary is a built-in official feature and includes options in few different languages but CUSTOM dictionaries are not. It's possible to add dictionaries beyond what Kobo includes but it takes a little bit of work.

I missed the "custom". Sorry about that.

It seems to be a limited selection of languages (EN, DE, ES, FR, IT, PT, TR, SE, JP on my Kobo), with both EN-XX and XX-XX available for most languages. It doesn't look like you can add your own, at least not on my kobo.

If you use Koreader then yes there are hundreds of dictionaries you can put.