In fact, this way of creating a fake language is much simpler and produces a much more plausible result:
1) create a list of common words, about 20-30, write them down
2) create 10-20 common combinations of these common words, write them down
3) start writing mixing common words and common word combinations with random longer words, which would occasionally repeat
4) done
There is nothing wrong for a text in a natural language to have some repetitions, it's expected. In some styles of texts (recipes, log entries) it's even mandatory. There is nothing wrong with that, there is no need to fight against this and the result looks very much like an unknown language. The statistics would differ significantly from Voynichese, but maybe they would be closer to real languages, and what is more, no-one in the XV century would go over the text with a scientific calculator and measure token type ratios.
1) create a list of common words, about 20-30, write them down
2) create 10-20 common combinations of these common words, write them down
3) start writing mixing common words and common word combinations with random longer words, which would occasionally repeat
4) done
There is nothing wrong for a text in a natural language to have some repetitions, it's expected. In some styles of texts (recipes, log entries) it's even mandatory. There is nothing wrong with that, there is no need to fight against this and the result looks very much like an unknown language. The statistics would differ significantly from Voynichese, but maybe they would be closer to real languages, and what is more, no-one in the XV century would go over the text with a scientific calculator and measure token type ratios.