That's how it has always been for all places. Admins have the power to erase anything that goes against Reddit's ToS. Depicting spez under the guillotine is against their ToS, but writing "fuck spez" isn't, which is why one gets deleted and the other remains.
It makes sense IMO. It's just like admins having the power to erase swastikas, homophobic or transphobic content, blatant product advertisements and so on. Nothing wrong with it, IMO.
Kindle has a great integrated dictionary, and as long as it has an internet connection it also has integrated wikipedia and translation searches. I've found translations to be serviceable enough for regular vocabulary and sentences.
Honestly, I think the kindle has been one of my best purchases yet.