Bitwarden supports generation of Diceware/XKCD style passphrases thanks to this feature request. However, Bitwarden will always force a delimiter character: if I remove the value from the corresponding input field, it will default to a space, generating phrases like Correct Horse Battery Staple.
Please make the separator optional. This is supported by several other generators such as xkpasswd.net, batterystaple.pw or correcthorsebatterystaple.net.
Background: In a perfect world, I would use the space character as a delimiter, but most systems sadly reject spaces in passwords. However if I used e.g. -, it would be more cumbersome to type. Therefore I decided to not use any delimiters at all, which of course does not affect entropy in any way.