Decryption input: US keyboard layout may confuse users, briefly explain used encryption
On encryption key input the keyboard layout defaults to US, which breaks special characters (for other layouts).
In "Encrypting your partitions": Hint, that the keyboard input is factual US, so non-US keyboards can only use a subset of input keys. [Hints in the CLI on setup would be very helpful as well]
A quick explanation of used methods (including how entropy of never-written space is ensured) would be great as well.