I was excited to use this for practicing writing Korean. Unfortunately it looks like whatever regex is looking at what I type does not like Korean characters... :/
I had the same experience but with Japanese. It isn't the Regex but that it is looking for certain keypresses, which are being captured by your IME. The IME prevents any detection from occurring.
You can test my theory by typing in Korean then pressing Ctrl+C, which isn't captured by the IME, and registers a "C" press on the site, which starts the timer.
You can test my theory by typing in Korean then pressing Ctrl+C, which isn't captured by the IME, and registers a "C" press on the site, which starts the timer.