KARA
Gyuri - Japanese
Nicole - English, Spanish (conversational)
Seungyeon - English

LED Apple
Hanbyul - English, French (basic)

M.peror
D.Kash - English
Jaerim - English (conversational)

MBLAQ
Thunder - English, Tagalog, Japanese (basic)
Joon - English (conversational)
Seungho - Japanese (conversational)

M.I.B
Kangnam - Japanese, English (conversational)

Miss A
Min - English
Fei - Mandarin Chinese, Cantonese (basic/conversational)
Jia - Mandarin Chinese

Monday Kiz
Hanbyul - English

Nine Muses
Hyuna - Japanese (conversational)
Sera - English (conversational)

NU’EST
Aron: English, Japanese

N:SONIC
Eunho - English
Jonguk - Mandarin Chinese

One Way
Chance - English
Peter - English
Young Sky - English

Rainbow
Hyunyoung: Mandarin Chinese

RaNia
Joy - Thai, Japanese, English
Riko - Japanese
Leejo - Mandarin Chinese

S.E.S
Eugene - English
Shoo - Japanese

SHINee 
Key - English, Mandarin (basic)
Onew - English (conversational), Mandarin Chinese (basic)
Minho - Mandarin Chinese (basic)
Taemin - Mandarin Chinese (basic)
Jonghyun - Mandarin Chinese (basic)

Shinhwa
Eric - English
Andy - English 
Hyesung - English
Dongwan - Japanese

SISTAR
Dasom - English (Basic)

SPICA
Jiwon - Japanese 

SS501 
Hyunjoong - Japanese
Hyungjoon - Japanese, English (conversational)
Youngsaeng - Japanese
Jungmin - Japanese, Mandarin Chinese (basic)
Kyujong - Japanese

Super Junior
Sungmin - Japanese, Mandarin Chinese  (basic)
Donghae - Mandarin Chinese (conversational)
Eunhyuk - Mandarin Chinese (basic)
Kyuhyun - Mandarin Chinese (conversational), Japanese (basic)
Siwon - Mandarin Chinese, English (conversational)
Kibum - English
Henry - Cantonese, Mandarin Chinese, English, Taiwanese (basic), French (basic)
Zhou Mi - Mandarin Chinese, Cantonese 
Ryeowook - Mandarin Chinese (conversational)
Heechul - English (conversational), Japanese (basic)

Source~

Hahaha Heecul.. so cute xD