fonts-khmeros-udeb software package provides Debian-Installer font for the Khmer language of Cambodia, 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 fonts-khmeros-udeb
fonts-khmeros-udeb is installed in your system.
Make ensure the fonts-khmeros-udeb package were installed using the commands given below,
$ sudo dpkg-query -l | grep fonts-khmeros-udeb *
You will get with fonts-khmeros-udeb package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | debian-installer udeb packages |
| Package | fonts-khmeros-udeb |
| Version | 5.0-7 |
| Description | Debian-Installer font for the Khmer language of Cambodia |
| Sub Section | Debian-installer |