Other common methods include appending a particular character to each word or alternate words...creating a pattern of sort, but this again makes it difficult to remember, which was the reason why we preferred passphrases instead of passwords in first place.
In English. Not all books in all languages ever published are "somewhere out there".
I mean, they mostly are or can be. What's the point on relying on "nobody happened to catalog the book I copied my passphrase from"? Are you going to check every week that nobody uploaded it to an archive site?
There's easier schemes that don't rely on that.
It's unlikely it will be done for a lot of languages.
> There's easier schemes that don't rely on that.
Remembering random words is hard. This is how we got into this in the first place.