Issues with typing Korean using Braille Input

Hello all. I am enjoying, the Braille input on ios 8.4. There are some minor bugs that need to be fixed, but I have almost no problem typing English text in grade 2. I had started to test other languages like Japanese and Korean. Unlike English input, some characters were less responsive. I found specific characters I could only enter with uncontracted Braille as well. Has anybody discovered any foreign language problems? I also would like to know where I can report issues like this
Thanks,