previous Basque theories of the Voynich ms?

[MarcoP]

Re-interpreting the anomalous character conditional entropy  as "small alphabet size" is certainly incorrect, but indeed the concept of conditional entropy is not that easy to grasp (I am still not sure I fully understand it).
Alphabet size has an impact on h1 (character entropy), not much on h2 (conditional character entropy). This is nicely illustrated in You are not allowed to view links. Register or Login to view.'s figure 4: h2 only shows a minimal hint of positive correlation with alphabet size.

Also, the size of the alphabet of Voynichese is not known and different transliteration systems give different answers. But conditional entropy has been shown to be relatively robust and not much above 2, when using different transliterations (see Rene's Table 2 You are not allowed to view links. Register or Login to view.).

On the other hand, European languages (Basque included) have a much higher conditional entropy, close to 3. In the attached graph, I manually added a green star for 4000 words from You are not allowed to view links. Register or Login to view. to one of the plots from You are not allowed to view links. Register or Login to view.. 
The values I get for LVP are:
h1: 3.89
h2: 3.01

The red triangles closer to Voynichese correspond to Hawaiian and Asian languages like Tagalog and Minjiang.
Rene's original plot already included a Basque sample (one of the yellow diamonds).