Hello Carsten, > Mozilla has changed how Add-Ons are now recognized and integrated with > Thunderbird 68. > Currently the old way how we can avoid the required installation of the > spellchecking Add-Ons isn't working anymore. You will now need to > install the German spell checking Add-On manually. > > https://addons.thunderbird.net/de/thunderbird/addon/german-dictionary/
This link did help. But, the link inegrated into program do download additional languages does direct to an old languagepack that is no longer working.
