Why is there even a Voynich B?

[Jorge_Stolfi]

Frequent or function words, like “os”, “la”, or “que”, behave very similarly across all texts, so NMF spreads them over several topics.

Not sure I understand this point.  But the words that I listed in my previous post occur exclusively in only one of the three "languages" (DC1+DC2, DC3, and DC4).

I suspect that the problem is that NMF had a large rate of mis-classification, so that (say) 10-20% of the DC4 parags were classified as topic 0 or 1, instead of topic 2.  Is this the case?

Could you please list a couple of parags from DC3 that were so mis-classified?  Maybe they are neither Portuguese nor Spanish, but just "Iberian"...

All the best, --jorge