Which documents can be registered?

1. On the basis of your national law, is it possible in your national system to register (notarial) deeds that were drawn up by a foreign notary? If possible, could you please provide a legal basis?

Yes, it is possible, but the deeds need to be attached with the translation in Italian.
Art. 33 of D.P.R. 445, December 28th 2000

2. On the basis of your national law, is it possible to register (notarial) deeds that were drawn up in a foreign language? If possible, could you please provide a legal basis?

Yes, it is possible if there is attached the translation in Italian.
Art. 33 of D.P.R. 445, December 28th 2000.

3. On the basis of your national law, is it possible to register multilingual deeds? If possible, could you please provide a legal basis?

If all the necessary elements can be detected from the multilingual module, it is not necessary, but if there are additional elements, the sworn translation is needed.

4. Which procedure do you follow if you receive a deed from a foreign party that does not fulfill your registration requirements? In particular, in which language does the land registrar communicate with the foreign party? In particular, if the foreign party neither speaks your mother tongue nor English, is the assistance of translators required?

The land register communicates with the foreign party in Italian.