Hello
I wanted to install English-Slovenian dictionary on Kobo Clara (prepared by me using Penelope tool) but it does not work on Kobo with our language whatever I do. I read this post 10 times already
At the end I did the simplest solution: I removed downloaded Portuguese dictionary (in my case dicthtml-en-pt.zip), and replaced the Slovenian (renaming my ZIP ending with pt suffix. So now if I translate word with English-Portugues dictionary, I get Slovenian translation.
Stupid but it works for me
I found the only problem that if dictionaries are updated by WIFI, I get lost it :/