YOU SAID:

i would like to learn how to speak in japanese on day

INTO JAPANESE

当日は日本語で話せるようになりたいです。

BACK INTO ENGLISH

I want to be able to speak Japanese on the day.

INTO JAPANESE

当日は日本語が話せるようになりたいです。

BACK INTO ENGLISH

I want to be able to speak Japanese on the day.