im-config software package provides Input method configuration framework, 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 im-config
im-config is installed in your system.
Make ensure the im-config package were installed using the commands given below,
$ sudo dpkg-query -l | grep im-config *
You will get with im-config package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | X Window System software |
| Package | im-config |
| Version | 0.29-1.4 |
| Description | Input method configuration framework |
| Sub Section | x11 |