aspell-de-alt software package provides German dictionary for aspell (old spelling), 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-de-alt
aspell-de-alt is installed in your system.
Make ensure the aspell-de-alt package were installed using the commands given below,
$ sudo dpkg-query -l | grep aspell-de-alt *
You will get with aspell-de-alt package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Text Processing |
| Package | aspell-de-alt |
| Version | 1:2-30 |
| Description | German dictionary for aspell (old spelling) |
| Sub Section | Text |