Glad you like that. We don't show that on the study page version of the sentences because it takes a bunch of extra time to look up those word-level vocabulary items, so we don't do it for the sentences loaded with the study prompts, since odds are less likely you'll look at them and the study prompts need to load quickly.

Can't you load in the additional data after the page is fully displayed?
I do like this feature (though I rarely use the website), but I always forget the hotkey to turn off PeraPera Chinese (which is AWESOME)...