- Ålands Framtid – AF
- Autonomie Liberté Participation Écologie – ALPE
- Bayernpartei
- Bloc Nacionalista Valencià
- Bloque Nacionalista Galego – BNG
- Democratic Party of Artsakh – DPA
- Dostluk Esitlik Baris Partisi – DEB
- Enotna Lista – EL
- Erdelyi Magyar Neppart – EMN
- Esquerra Republicana de Catalunya – ERC
- Eusko Alkartasuna – EA
- Femu a Corsica
- Fryske Nasjonale Partij – FNP
- Inseme per a Corsica
- Kaszebsko Jednota – KJ
- L’Altro Sud – AS
- Latvian Russian Union – LRU
- Lausitzer Allianz – Luzicka Alianca
- Liga Socijaldemokrata Vojvodine – LSV
- Liga Veneta Repubblica
- Lista Za Rijeku
- Magyar Kereszténydemokrata Szövetség
- Mebyon Kernow – MK
- Moravian Movement
- Mouvement région Savoie – MRS
- Nieuw-Vlaamse Alliantie – N-VA
- Nueva Canarias
- Oljka Party
- Omo Ilinden Pirin – OMO
- Partit Occitan – PÓc
- Partito Sardo d’Azione – PSd’Az (SUSPENDED)
- Partitu di a Nazione Corsa – PNC
- Patrie Furlane
- Plaid Cymru
- Pro Lombardia Indipendenza
- PSM-Entesa
- Rainbow – Vinozhito
- Ruch Autonomii Slaska – RAS
- Schleswigsche Partei – SP
- Scottish National Party – SNP
- Slovenska Skupnost – SSK
- Süd-Tiroler Freiheit
- Südschleswigschen Wählerverbands – SSW
- Union Démocratique Bretonne – UDB
- Unitat Catalana – UC
- Unser Land
- Yorkshire Party – YP