It cannot be a language - in reference to Koen's latest video

[MarcoP]

About the alphabet. An 24 letter alphabet can be written using 13 signs, 12 letters and one "joker"/shifter. If the joker is attached to a letter, it will change/shift it to another letter (second meaning). So the alphabet will be represented both by single signs and bigrams.

That's a special case of a verbose cipher, a scenario that is often considered. An implication is that Voynichese spaces cannot be trusted, because Voynich words are not longer than plain-text words.