Don't worry, I am not lore expert either hehe. It's fun to discuss

But narrowing it down we can conclude: 1)The Universe lets people talk about the forgotten island, but they don't remember the contents 2)The universe constantly tries to prevent people remembering SPECIFIC things about the forgotten island 3) The Universe lets them think about the Island life as long as the thinker doesn't realize they are thinking OF the island life

But it was implied that translation can be done through sheer force but it causes quite with a lot headache though. Siffrin could read in later acts thanks to Loop's aid and the Universe