[Mailman-i18n] Improving mailman pt_BR translation

Hello there, I'm Diego Morales, and I would like to contribute some improvements to mailman's pt_BR translation. How should I proceed? Should I contact directly Gleydson Mazioli or the Debian portuguese translation team who are listed in the malman.po file? I'm a brazilian native, and in my workplace folks have corrected some poor translated phrases in mailman.po. I (and others there) would like to review and contribute those translations to the project. Thank you for your time and this great software, Diego Morales.