I currently have a Kindle Paperwhite for language learning but find it slow and tedious to look up individual words. So I looked into interlinear texts and found
this thread by @Doitsu as well as
source code to generate interlinear epub documents through Google translate.
Now I'm considering getting a Kobo Libra H2O but I'm wondering if they support interlinear books. Or does maybe KOReader support it if I install it on Kobo?