You can install the trial version on as many computers as you'd like, but do note that it is limited to 14 days. Of course if this is something you'll be doing frequently, profiting off of, and there's no chance any students will ever buy a copy, it'd be nice to work something else out (feel free to email us).
We don't have a Korean localized version, only English, French, German, Spanish, Italian, Japanese, and Chinese.
Academic pricing is available through our Education Store. There's more info on this on our FAQ.