liblingua-de-ascii-perl software package provides convert German umlauts to and from ascii, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install liblingua-de-ascii-perl
liblingua-de-ascii-perl is installed in your system.
Make ensure the liblingua-de-ascii-perl package were installed using the commands given below,
$ sudo dpkg-query -l | grep liblingua-de-ascii-perl *
You will get with liblingua-de-ascii-perl package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Perl |
| Package | liblingua-de-ascii-perl |
| Version | 0.11-1 |
| Description | convert German umlauts to and from ascii |
| Sub Section | Perl |