aspell-bg software package provides Bulgarian dictionary for aspell, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install aspell-bg
aspell-bg is installed in your system.
Make ensure the aspell-bg package were installed using the commands given below,
$ sudo dpkg-query -l | grep aspell-bg *
You will get with aspell-bg package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Text Processing |
| Package | aspell-bg |
| Version | 4.1-3ubuntu1 |
| Description | Bulgarian dictionary for aspell |
| Sub Section | text |