Vepsian song, understood by 6000 speakers, is represented by the accordion-led Noid, from the Finno-Ugric region of Russia.
The Udmurt Republic will be cheering on The Silent Woo Goore, who mix traditional Udmurt folk with modern, global sounds.
"Home nations" music fans might be hoping for a victory by Macanta, a Glasgow-based band who sing in Scottish Gaelic over a blend of guitars, viola, clarsach and drums.
They are led by Dol Eoin, a singer-songwriter from the Isle of Harris, who began writing in Gaelic following a revelation in his first Gaelic dream.
Irish Gaelic is represented by Aoife Scott, who grew up in a performing family and became immersed in Gaelic song from listening to her grandparents, mother, aunt and uncles making music around the fire.
Scott, who believes Gaelic song is becoming "cool", has embraced the role of Irish "musical ambassador" at the contest and is hoping to meet tour promoters who are seeking new talent to add to the European festival circuit.
This year's Liet final welcomes the Rumantsch, Udmurtian, Burgenland-Croat and Ladinian languages for the first time.
Udine was chosen as the venue because the province is the home of the Frilan "Romance" language, which has 800,000 speakers.
- INDEPENDENT