Spell checking

Hunspell is a spell checker and morphological analyzer library used by Firefox, Thunderbird, Chromium, LibreOffice and more.
Install the following packages to enable system-wide spell checking and hyphenation support (add languages for 
hunspell and 
hyphen at your discretion):
pacman -S hunspell hunspell-{de,en_US} hyphen hyphen-{de,en}