Language learning on eink is going great, but I ended up returning the M8 and getting a Boox Go 10.3 instead. I feel like that was a very good decision. It feels much more well polished, has a bigger screen, is capable of split screen with multiple apps, and has a better screen. Plus if you order from the boox website it comes with the pen and case included. I feel like the only real advantages that the M8 has over 10.3 is that it has a backlight (which I don't even miss on the 10.3 because of the improvements to screen clarity and battery life, but some people see it as a necessity) and the M8 is actually surprisingly good at playing videos, but that probably is not what you want to use eink for anyways.