The Japanese version comes with a translation, but that's different from the lyrics, so people could look things up and find a translation of their own if they're interested.
Since I was doing all of it myself, I had to decide where I wanted to go with the songs, how to proceed with the chords, if the sound was alright, and all that detail on my own.
In English, the sounds and melodies I created were an inspiration to me, and words came to me as I explored the sounds, and from there I was able expand on the meaning.