Tired of annoying “red dots” under every single word because your language is not supported by OS X spell‑checker? Here's what to do to completely disable it. System‑wide & for ever.

To disable SpellChecker you need to rename folder containing its resource files. Simply open Terminal and write down:

  cd /System/Library/Services/AppleSpell.service/Contents/
  sudo mv Resources Resources_DISABLED

Original source of solution: http://www.chromescreen.com/disable-spell-checker-in-mac-osx-system-wide/

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