The Albanian language is attested in a written form beginning only in the 15th century AD, when the Albanian ethnos was already formed. In the absence of prior data on the language, scholars have used the Latin and Slav loans into Albanian for identifying its location of origin. The proto-Albanian language had likely emerged before the 1st century CE, when contacts with Romance languages began to occur intensively. Some scholars have attempted to conjecture the unattested language, and have eventually drawn up interpretations on the assumed proto-Albanian "Urheimat" and society based on the reconstructed lexicon.