You can send Zephygrams with accents and other symbols used in some foreign languages with the help of a program called langwrite. Langwrite is in the potluck locker, so in order to access it you would need to type
add potluck
To find exact details on how langwrite works, you should type
man langwrite
Then, to use langwrite with Zephyr, you would type
langwrite | zwrite username
to send the output of the langwrite program over Zephyr as the message. On some remote connections characters produced by langwrite may display incorrectly or not display at all.