Well.. luck made me discover how to do it. Changing the setting in Edit/Spelling/ does work. *But* in won't change the red underlines until you click on the word. Sorry. Issue solved. Le 04-04-13, à 2:10 pm, Alexandre Leroux a écrit : > Is there a way to change the spelling dictionary for specific emails > in Mail? I equally write emails in french, english and spanish. Since > my MacOS is running in french, Mail spelling uses the french > dictionary. I have not found a way to use another dictionary for > specific emails. Changing the setting in Edit/Spelling/ does not work. > Any clue ?