How would Europe have developed differently if a metal-type printing press were invented between 800 and 1000 AD?
In this scenario a press would have as first beneficiaries to the Universities and their teachers and students thanks the sudden increase in the quantity and availability of books and in its accessibility to have its price reduced to the one of the manuscripts.
Perhaps the Universities may become in publishing centers also from theirs own.
Another possible beneficiary would be the
School of Translators of Toledo (Castile) that would see increased production and the diffusion of its manuscripts to be able to be printed.
But unlike OTL, the printing of the Bible will not be a priority and surely, that the Bible print work would remain in the hands of the Church. But possibilities would be open on the one hand that religious dialects and disputes (with Constantinople) or OTL policies, through missives, manuscripts would be produced faster and more widely.
But on the other, unless his European pairs follow example of the Castilian King that had stimulates / orders to his translators and writers, that instead of Latin being the final language of the translation (from Greek and / or Arabic), it was the vernacular / romance (Castilian).
If being followed or not its example, we will could come to see an early development of the vernacular languages like language of culture next to the Latin or replacing it... of course, if the monarchs opt to do or don't for themselves or for being too influenced by his academic counselors (Latin scholars).
The future works (books) printed/edited? will be mostly in Latin language with the obvious possible risks for the continuous development and strengthening of the different national languages.
Finally, it may happen that the printing press is used by some regional power to print in the regional language rather than in Latin or the 'national' language or, given the time, at least the most widespread / prestigious.