YOU SAID:

I mistook you for a walking llama

INTO JAPANESE

私は歩いているラマに間違った

BACK INTO ENGLISH

I made a mistake on walking llama

INTO JAPANESE

私はラマを歩いて間違った

BACK INTO ENGLISH

I was wrong walking around Rama

INTO JAPANESE

私はラマを歩いて間違っていた

BACK INTO ENGLISH

I was wrong walking in Lama

INTO JAPANESE

私はラマで歩いて間違っていた

BACK INTO ENGLISH

I was wrong walking in Rama

INTO JAPANESE

私はラーマで歩いて間違っていた

BACK INTO ENGLISH

I was wrong walking in Rama