YOU SAID:

but i know what did you sing but i'm too lazy to write that in japanese

INTO JAPANESE

何を歌ったのかはわかりますが、日本語で書くのが面倒です

BACK INTO ENGLISH

I know what I sang, but it's a hassle to write in Japanese

INTO JAPANESE

何を歌ったかは知っていますが、日本語で書くのは面倒です

BACK INTO ENGLISH

I know what I sang, but writing in Japanese is a hassle

INTO JAPANESE

何を歌ったかは知っていますが、日本語で書くのは面倒です

BACK INTO ENGLISH

I know what I sang, but writing in Japanese is a hassle