Though the substratum status of many Romanian words is not much disputed, their status as Dacian words is controversial, some more than others. There are no significant surviving written examples of the Dacian language, so it is difficult to verify in most cases whether a given Romanian word is actually from Dacian or not. Many linguists however favor a Dacian source for the Romanian substratum. Many of the Romanian substratum words have Albanian cognates, and if these words are in fact Dacian, it indicates that the Dacian language may have been on the same branch as Albanian.