Dictionaries in Other Languages on macOS

For better integration with macOS, Postbox now uses the system dictionary service and all of the dictionaries installed on your system. 

To change the dictionary,

  • Go to Preferences > Composition > Spelling 
  • Select your desired default language. You can also change this from the Spell check toolbar button in the compose window.

Installing Dictionaries for Other Languages

If Apple does not support a dictionary for your language, you can manually install additional dictionaries into your Operating System using the following steps:

  • Download and save the desired dictionary to your hard drive. (Firefox users, be sure to right-click the download link, then select "Save Link As..." from the contextual menu.)
  • Change the file extension from .xpi to .zip
  • Double click the file to access the contents of the zip archive.
  • Under the dictionary subfolder in the zip archive, select the .dic and .aff files and copy them into <Your Home Folder> / Library / Spelling
  • Restart Postbox

This dictionary should now be available to the system dictionary service and will appear in the list of Postbox dictionaries.