Kadugli, also Katcha-Kadugli-Miri or Central Kadu, is a Kadu language or dialect cluster spoken in South Kordofan. Stevenson treats the varieties as dialects of one language, and they share a single ISO code, though Schadeberg (1989) treats them as separate languages.

There are five commonly cited varieties. Three of them are rather divergent, on the verge of being distinct languages:

• Katcha (Tolubi, Dholubi)
• Kadugli proper (Dakalla, Talla, Dhalla, Toma Ma Dalla, Kudugli, Morta)
• Miri

However, they share a single orthography and use the same literacy materials (Ethnologue).

Of the two other commonly cited varieties, Damba is somewhat closer to Kadugli, while Tumma appears to be a (sub)dialect of Katcha.

Villages in which the dialects are spoken according to the 22nd edition of Ethnologue:

• Katcha dialect: Belanya, Dabakaya, Farouq, Kafina, Katcha, and Tuna villages
• Kadugli dialect: ’Daalimo, Kadugli, Kulba, Murta, Takko, and Thappare villages
• Miri dialect: Hayar al-Nimr, Kadoda, Kasari, Kuduru, Kya, Luba, Miri Bara, Miri Guwa, Nyimodu, Sogolle, Tulluk, and Umduiu villages

• Katcha-English Dictionary (one of the Kadu languages)
• Katcha, Kadugli, and Miri basic lexicon at the Global Lexicostatistical Database