How to install a spelling checker
I would like to switch between German, Spanish and English. I have loaded down first the German one, did get a message, that it was installed properly , I started Windows 10 new, but I cannot link it to Thunderbird. If I click on "Option" > "Spelling Check" I do get an empty Window and wrongly written words are not recognized in my document. Thanks for your help in advance. MBA
選ばれた解決策
Does this article help?
http://www.ghacks.net/2013/04/30/thunderbird-switch-dictionary-automatically-based-on-recipients/
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have you tried using the options in
On the toolbar 
> Options> Composition >spelling?
Thanks, I did it. The receiving window did not show the language add-on previously installed successfully. All I can do there is to install it again or select immediate spelling or no. This does not help me. Thanks for additional help if possible. MBA