https://pgaskin.net/KoboStuff/kobofirmware.html
Changelogs;
Traditional Chinese:
You can now change the display language of your Kobo eReader to Traditional Chinese.
(Go here > Settings> Language)
Wi-Fi:
You will now be notified if you are connected to your Wi-Fi network, but cannot access Kobo's services.
Several other Wi-Fi problems are also addressed.
Resolved:
In addition to problems with downloading and opening books from the archive, we also solved the most common device crash problem that was reported in the previous update.