Kinsora, I've been in the same shoes with the whole "ching chong pong ping pang" issue.
I used to be teased by my "best friend" when I was young.
I remember when I was on the bus in middle school she actually shouted to me that I was a "Jap" for drawing in an anime style. The bus was crowded, I got stared at and I was in my super shy years then, so I kept my head down and my mouth shut while an 8th grader who sat near me just stared and laughed.
I wish now that I stood up for myself.
Now I don't get teased for it. Instead I actually sit in a teacher's room and exchange some simple conversations with him in Japanese while others sit around in there.
Sometimes a fellow will even speak up saying it's "inspiring".