[TYPO3-english] Powermail: localize the labels of a form

[Ian Solo]

Hi,
is there a way to localize the FE labels of a form without localizing 
the entire record in the BE?

I can localize a custom marker, by instance:
###POWERMAIL_LOCALLANG_NEWLANGUAGEMARKER###

and setting in the setup:
plugin.tx_powermail_pi1._LOCAL_LANG.gb {
    locallangmarker_newlanguagemarker = This is a new marker text
}

But, how to localize ###LABEL### marker for each labels?

Regards,
ian