From version 3.7.2, you can set your own preferred language for Manga Rock.
However, we are aware that whenever the device is rotated, the app language will glitch out and revert to the device language in random places.
This is a confirmed bug and will be fixed in the upcoming update.
We apologize for the inconvenience caused and thank you for supporting us. If you need any further assistance, please contact us via our in-app support center or email firstname.lastname@example.org.
Affected version: From 3.7.2 and above
First reported date: Jan 9, 2019
Resolved date: TBC