Sparkweb with non-english input

I have been attempting to use non-english input with SparkWeb recently and find that it does not accept input at all when I change the input language.

Specifically, I would like to be able to hold conversations with friends in Japanese using the Japanese Language setting and the Windows IME input. However when I change to Japanese language, even if setting to Direct Input method which would just enter english characters anyhow, it does not work. Yet, if I type the Japanese text into Notepad then copy and paste it will send the characters.

Does anyone know of a way to be able to input directly into SparkWeb without having to copy/paste?

Dear Sir:

I use spark to use non-English (Chinese) of PC, I can not type and (non-English) input then turn on the the spark client. all windows can not type Chinese on Windows 10, It told us IME disable, I try to remove and install newer version. 2.6.3 and 2.7.7, as same problem.Please help.