Harshen Boon

Boon ko Af-Boon harshe ne na Cushitic da ke kusa bacewa wanda mutane 59 (a shekara ta 2000) ke magana a gundumar Jilib, yankin Juba ta Tsakiya, Somaliya . A cikin shekarun baya-bayan nan sun koma yaren Maay na Jilib. An ba da rahoton duk masu magana a cikin 1980s sun girmi 60. Ayyukansu na al'ada sune mafarauta, masu aikin fata da, kwanan nan, masu yin takalma . 

Lamberti  da bin sa Ethnologue da Glottolog suna barin yaren da ba a tantance shi ba a cikin Kushitic ta Gabas.   Blench (2006) ya bar shi a matsayin wanda ba a rarraba shi a cikin Cushitic, saboda bayanan sun yi yawa don ba da izini fiye da haka. Classification of Afroasiatic, ms.

Ba kamar harsunan Somaliya ba, sunaye da karin magana a Boon galibi suna ƙarewa da wasula, misali afi 'baki', 'jididi ', illa 'eye', luki 'kafa'; hebla 'shi' (cf. misali Somali af, hebel 'wani', tushen, il, lug ; hebel 'wani'). Kalmomi da yawa waɗanda ba su da ƙima a cikin Somaliya amma har yanzu a cikin wasu yarukan Cushitic Lamberti ya lura da su::

 bafee 'huhu' ~ Oromo bafeed 'to numfashi' (bambanta sambab ' huhu')
 booGo 'jaw' ~ Oromo bookho (contrast Somali daan )
 dhinne 'rib' ~ Oromo čʼinnač (contrast Somali feer )
 helliiso 'hanta' ~ Rendille xelesi (kwatankwacin giyar Somaliya)

Wasu kalmomi kamar ba a san su ba ne: 

 dimbaro 'lip'
 kumburi 'koda'
 figgilo ' farce '
 gabo 'breast'
 maaka 'knee'
 muddur 'yatsa'
 naju 'man'
 naata 'jiki, fata'
 simbiino ' hawaye'

 Bayanan kula 

 Manazarta