aspell-bn software package provides Bengali (bn) dictionary for GNU aspell, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install aspell-bn
aspell-bn is installed in your system.
Make ensure the aspell-bn package were installed using the commands given below,
$ sudo dpkg-query -l | grep aspell-bn *
You will get with aspell-bn package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Text Processing |
| Package | aspell-bn |
| Version | 1:0.01.1-1-2 |
| Description | Bengali (bn) dictionary for GNU aspell |
| Sub Section | Text |