Using the Encodings pane of Terminal preferences

Select the checkbox next to the international character encodings you want to be available to be used by Terminal. After you have enable the encodings, you can select them in the International section of the Advanced pane of the Settings preferences.

To select all of the international character encodings, click the Enable All button.

To deselect all of the international character encodings, click the Disable All button.

To return to the original international character encodings settings, click “Revert to Defaults.”