Voynich Welsh Numerology

[ReneZ]

... then replaced the words with other words with the same numeric value, then invented the letters and after all, copy the text on the parchment.

This is what I call too complex.

I fully agree. It is straightforward to convert Voynichese words to numbers, but the author would have had to take the numbers (1-9) that he got out of a plain text, and convert these to several thousand different words.

The process how he would have done that is not at all described.

I see this as a typical consequence of the 'decoding approach'. People tend to concentrate on what would be the method to convert the MS text to plain text. For me, it is important to always try to keep in mind what the encoder would have done, i.e. the 'encoding approach'.