ibulgarian software package provides Bulgarian dictionary for ispell, 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 ibulgarian
ibulgarian is installed in your system.
Make ensure the ibulgarian package were installed using the commands given below,
$ sudo dpkg-query -l | grep ibulgarian *
You will get with ibulgarian package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Text Processing |
| Package | ibulgarian |
| Version | 4.1-3ubuntu1 |
| Description | Bulgarian dictionary for ispell |
| Sub Section | text |