apertium-mk-bg software package provides Apertium translation data for the Macedonian-Bulgarian pair, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apertium-mk-bg
apertium-mk-bg is installed in your system.
Make ensure the apertium-mk-bg package were installed using the commands given below,
$ sudo dpkg-query -l | grep apertium-mk-bg *
You will get with apertium-mk-bg package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | apertium-mk-bg |
| Version | 0.2.0~r49489-1 |
| Description | Apertium translation data for the Macedonian-Bulgarian pair |
| Sub Section | Science |