Friulian or Friulan is a Romance language belonging to the Rhaeto-Romance family, spoken in the Friuli region of northeastern Italy. Friulian has around 600,000 speakers, the vast majority of whom also speak Italian. It is sometimes called Eastern Ladin since it shares the same roots as Ladin, but over the centuries, it has diverged under the influence of surrounding languages, including German, Italian, Venetian, and Slovene. Documents in Friulian are attested from the 11th century and poetry and literature date as far back as 1300. By the 20th century, there was a revival of interest in the language.

Rhaeto-Romance, Rheto-Romance, Rhaeto-Italian,or Rhaetian, is a purported subfamily of the Romance languages that is spoken in south-eastern Switzerland and north-eastern Italy. The name "Rhaeto-Romance" refers to the former Roman province of Raetia. The question of whether these languages actually form a subfamily is called the Questione Ladina. The Italian linguist Graziadio Ascoli, writing in 1873, found them to share a number of intricacies and believed they formed a linguistic group. The Rhaeto-Romance languages differ from Italian in their evolution from Latin by having passed through a stage with phonemic vowel length, undergone certain consonant developments, and possibly developed a pair of central rounded vowels. If the subfamily is genuine, three languages would belong to it: Romansh in Switzerland, and Ladin and Friulian in Italy. Their combined number of speakers is about 660,000; the large majority of these speak Friulian.