iamerican software package provides American English dictionary for ispell (standard version), 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 iamerican
iamerican is installed in your system.
Make ensure the iamerican package were installed using the commands given below,
$ sudo dpkg-query -l | grep iamerican *
You will get with iamerican package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Text Processing |
| Package | iamerican |
| Version | 3.4.00-5 |
| Description | American English dictionary for ispell (standard version) |
| Sub Section | Text |