If you could learn another language, What will it be?

I am not good at english .

>> I am not good at English.

I can`t think of learning another language.(Japanese,Chinese....)

>> I can\'t think another language to learn.

I am forgetful.

>> CORRECT.

I don`t remember what just i said. ㅋㅋ

>> I usually can\'t remember what I just said. 

I have to talking and repeating, even if it is wrong.

>> I have to talk and repeat words and sentences if it\'s wrong.

I am ashamed, but I have to repeat it over and over.

>> I feel ashamed, but I have to repeat it over and over.