You may say 少し日本語をしゃべるけど、上手じゃありません。 (sukoshi nihongo wo shaberu kedo, jouzu ja arimasen) which would translate into "I speak a little Japanese, but I am not good" in Japanese. You may also use 話す (hanasu) instead of しゃべる (shaberu), though from my experience しゃべる seems to come up more in spoken conversation.
"Anta WA mada (mada) yowai" (pronounced: on-tah wah mah-dah (mah-dah) yo-why).
'You have a very good voice' would translate to æŒå£°ãŒã¨ã¦ã‚‚ã„ã„ (utagoe ga totemo ii) in Japanese.
Sayonara .
You may say 'oshare' in Japanese; it means "fashionable," "stylish."
yoi or ii
TOTEMO furui
If you meant to say "konichiwa" then it means good afternoon/good day in Japanese :L
Ohao Gozaimasu.
Ohayo (OHIO)
yoi shokuyoku
This can be translated as "Your Japanese is very good," or "You speak Japanese very well".
U ask your mom
Hijo ni kanashii