Alexandre said:
Not according to the Catholic church officials who regularly sent Rome misives asking for money to convert the Orthodox majority throughout the period in question.
Of course, ethnicity played very differently in the Middle Ages so we aren't told what the ethnic, as opposed to religious, composition of the peasantry was. But, I do think that it's safe to assume that the vast majority of the Orthodox population was ethnically Romanian.
Do you have a better way of reflecting Transylvania's mixed population and march status? If you do, then I'm more than happy to hear it and discuss it.
I don't think that has anything to do with creating a Transylvanian province that mirrors the fact that it was ethnically very complex, not monocromatic Magyar (or monocromatic Romanian.)
Alexandre
To be honest I am very disappointed that after a long time the "culture in Transsylvania issue" has been raised again on the Forum.

So far there has been a broad consensus among all important parties concerned inculding Paradox (of course a quite decisive factor

), the EEP and AGC fora that Transylvania is given Magyar culture.
Those who have read some of mos posts may know that I only use facts and historical source as a base for discussion, so no surprise that you won’t find comments, explanations etc at the end of this post.
Why the province of Transsylvania must have Hungarian culture. At the moment I have had only little time to present you more facts but some issues very closely related to culture are listed below. These facts are grouped into 3 categories:
- census
- printing press
- religion
Census
The Vatican census of 1505 estimated the total population of the Kingdom of Hungary to be about 4 million souls, of which 77% were Hungarians, and the rest Germans, Croatians, Slovaks, Serbians and Vlachs.
The 1658 Census taken by the Jesuit Fathers showed the total population of Transylvania as 860,000 souls, of which about 240,000 were Vlachs.
(to the attention of Alexandre! 
)
Printing press
The first book in the Hungarian language was printed in Transylvanian by a Hungarian printer in 1471.
In 1598 there were 44 printing establishments working in Transylvania, producing up to this date 380 books, of which 18 were in German, 6 in Latin, 4 in Vlach, and the rest in the Hungarian language.
Religion
In 1545 Gaspar Heltai published the complete Hungarian translation of the Bible in the city of Kolozsvár, which not only served as the Hungarian capital but also as the new cultural center. A few years later Tinodi Lantos Sebestyen published his famous "Chronicles in Verses."
(just to be absolutely correct: The four Gospels of the New Testament were translated into the Vlach language in 1561, and published at the expense of the Hungarian landowner Miklós Forró of Brassó, thereby marking the birth of the Vlach / Rumanian literature. Later, in 1582 the Hungarian nobleman Ferenc Geszthy financed the translation and publication of the OId Testament in the Vlach (Rumanian) language.)
The first Protestant (Calvinist) congregation was established in Nagyenyed. (in Rumanian: Aiud.) From here on Protestantism spread rapidly throughout Transylvania.
Just after the Diet of Torda declared the freedom of religion in 1561, the Hungarian reverend Ferenc Dávid established the Unitarian Church in Transylvania. (Even today, though the Unitarian religion is widely spread all over the world, the center of the Church is still in Transylvania, where the Unitarian Bishop resides as the successor of the founder of the church).