YOU SAID:
is this thing only using japanese
INTO JAPANESE
これは日本語だけを使っている
BACK INTO ENGLISH
This is using only Japanese
INTO JAPANESE
これは日本語のみを使用しています
BACK INTO ENGLISH
I am using only Japanese
INTO JAPANESE
私は日本語だけを使っています
BACK INTO ENGLISH
I am using only Japanese
Come on, you can do better than that.