Language table 

Displays a list of languages for which you have a dictionary installed. 

To enable a language, select the language in the language table, then click on the Enable button. Alternatively, click on the check box in the Enabled column for the language to display a check mark in the check box.

Check spelling while I type

Select this option if you want Email and Calendar to check your spelling while you type. Email and Calendar checks your spelling against the dictionaries for the languages selected in the languages table.

Color for misspelled words

If you select the Check spelling while I type option, Email and Calendar underlines words in your messages that do not match terms in the dictionaries for the languages selected in the languages table.

Click on the color selector button to change the color of the line under words that do not match. Use the Pick a color dialog to select the color that you require.