Today I stumbled upon following example of sentence
今晩の番組で何かあるかい? konban no bangumi de nanka aru kai ?
As I understand from dictionary , this particle signifies "yes/no" question. Are this particle usual for colloquial language only or its regular particle ?
Regards,
アレクス
KAI particle

mandor
May 3, 2010

Sayaka-Matsuura
May 9, 2010
アレックスさん、
The ending particle KAI is very colloquial and only used in casual situations - and also, mostly used by male speakers.
In Colloquial speech, KAI is used instead of KA to mark a question. KAI has a softer, friendlier tone than the rather abrupt KA.
-Sayaka :P

mandor
May 12, 2010
Wakarimashita :) Osewani narimashita !

Sayaka-Matsuura
May 17, 2010
Dou itashimashite!
-Sayaka :P