libzim2 binary package in Ubuntu Bionic arm64

 ZIM (Zeno IMproved) is an open file format for storing the contents of
 wiki for offline usage. This file format is primarily focused on
 providing the contents of Wikipedia and Wikimedia projects for offline
 use.
 .
 zimlib is the standard implementation of ZIM specification, which
 implements the read and write method for ZIM files.
 .
 ZIM is a file format created with focus on extracting and encoding data
 from Mediawiki for offline use.
 .
 Features of zimlib are:
  * Native, coded in C++
  * Extremely fast
  * Minimal footprint
  * Minimal dependencies
  * Portable on most OS (Windows, Linux, Mac OS X)

Source package