My first battle was against a level 3 who claimed to have made Alteil.
They opened the game by saying " よろしくです"
At first, I though they were just playing around, so, I said "よろしお願い" right back to them.
The person was able to understand everything I said.
They then told me, "I am a president of GP-coreedge."
The person was able to communicate well with me, but their English wasn't perfect.
We continued to talk about if I liked Alteil, and how I found out about Alteil.
They were surprised when I told them I had played on the Japanese server. (When I spoke to the person in Japanese, they asked if I was Japanese also).
I won't give away their strategy, but, the game lasted longer than the average battle...