Logudorese Sardinian (Sardinian: sardu logudoresu, Italian: sardo logudorese) is one of the two written standards of the Sardinian language, which is often considered one of the most, if not the most conservative of all Romance languages. The orthography is based on the spoken dialects of central northern Sardinia, identified by certain attributes which are not found, or found to a lesser degree, among the Sardinian dialects centered on the other written form, Campidanese. Its ISO 639-3 code is src.