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Osing Basa Using ꦧꦱꦲꦸꦱꦶꦁ
Native to	Indonesia
Region	East Java Banyuwangi Regency Jember Regency Panti[1] Wuluhan[2]
Ethnicity	Osing people
Native speakers	(300,000 cited 2000 census)[3]
Language family	Austronesian Malayo-Polynesian Javanese Osing Basa Using ꦧꦱꦲꦸꦱꦶꦁ
Writing system	Javanese script and Latin Pegon script (historical)
Language codes
ISO 639-3	osi
Glottolog	osin1237
Areas where Osing is spoken by a majority of the population   Areas where Osing is spoken by a significant minority of the population

The Osing language (Osing: Basa Using; Indonesian: Bahasa Osing), locally known as basa Banyuwangi, is the Modern Javanese dialect of the Osing people of East Java, Indonesia. The Osing dialect uses a special diphthongization (changing the vowel [i] to [ai] and the vowel [u] to [au]) which is not found in any Other Javanese dialects. They are primarily distributed in Banyuwangi Regency, but can also be found in the eastern part of Jember Regency, particularly in districts of Panti and Wuluhan.^[1][2]

Some Osing words have the infix /-y-/ 'ngumbyah', 'kidyang', which are pronounced /ngumbah/ and /kidang/ in standard Javanese, respectively.^[4]

A dictionary of the language was published in 2002 by Hasan Ali, an advocate for the language's use in Banyuwangi.^[5]

Divergent Osing vocabulary includes:^[4]

• osing/sing 'not' (standard Javanese: ora)
• paran 'what' (standard Javanese: åpå Paran in standard Javanese mean existing)
• kadhung 'if" (standard Javanese: yèn, lèk, nèk, dhonge)
• kelendhi 'how' (standard Javanese: kepiyè, piyè)
• maning 'again' (standard Javanese: manèh, the Banyumasan dialect and some Gresik of Javanese also uses 'maning')
• isun 'I/me' (standard Javanese: aku, Lamongan and Gresik sometimes also uses 'esun')
• rikå 'you' (standard Javanese: kowè, the Banyumasan dialect also uses "rikå")
• ring/nong 'in/at/on' (standard Javanese: ning, nang, Malang also uses 'nong', the Balinese language and Old Javanese also uses "ring")
• masiyå/ambèknå 'even if'/'although' (standard Javanese: senadyan, senajan, najan, the Arekan dialect of Javanese also uses 'masiyå' / ambekna )

• Wittke, Jonas (2019). Status Planning and Regional Identity: The Case of Osing in Banyuwangi, Indonesia (Ph.D. thesis). Rice University. hdl:1911/105415.
• Arps, Bernard (2010), "Terwujudnya bahasa Using di Banyuwangi dan peranan media elektronik di dalamnya (selayang pandang, 1970–2009)", in Mikihiro Moriyama; Manneke Budiman (eds.), Geliat Bahasa Selaras Zaman: Perubahan Bahasa-Bahasa di Indonesia Pasca-Orde Baru, pp. 225–248, hdl:1887/15213
• Arps, Bernard (2009). "Osing Kids and the banners of Blambangan Ethnolinguistic identity and the regional past as ambient themes in an East Javanese town". Wacana, Journal of the Humanities of Indonesia. 11 (1): 1. doi:10.17510/wjhi.v11i1.142. hdl:1887/15219.

Osing language test of Wikipedia at Wikimedia Incubator

• Inside Indonesia - Bahasa Osing, Warisan Iswara Blambangan on YouTube (in Indonesian) - CNN Indonesia documentary
• Bahasa Using (Osing) Banyuwangi on YouTube (in Indonesian) – Balai Pelestarian Nilai Budaya D.I. Yogyakarta documentary