I found that I kept accidentally reading the English translations of vocab example sentences while trying to figure out what they meant, so I wrote a simple bit of CSS to blur them out.
Here’s an example of what it looks like (it works on the lesson page too, but I don’t have any vocab lessons right now to show it off):
You’ll need Stylus (Chrome/Edge, Firefox, Opera) or xStyle (Chrome/Edge, Firefox), or a more manual CSS injector like Stylebot (Chrome/Edge, Firefox) to use this CSS.
You can hover over the blurred sentence to unblur:
Enjoy!