A note about Jan-speak: Jan frequently uses onomatopoeic words/sound effects to describe his emotions. I want to find suitable substitutes for as much Jan-speak as possible, but I have left in some that have plenty of context clues to figure out what they mean. Here's what has been left in for these episodes:
Zowa-zowa: Something that makes a chill run up your spine. This is used in just about every episode so it's pretty easy to figure out what Jan's talking about when he uses it.
Niki-niki: Something likable; a good feeling. He uses this often.
Waki-waki: Feeling of excitement. Another one that's frequently used.
And in Lesson 6, there word play on kandou (感動 deep emotion) and kandou (漢堂 Jan's surname) that I painfully tried to make sense of. It's groan-worthy, but I hope it gets the point across.
Edit 6/20: Download links have been updated.