The ca locale is available in the source l10n, please add it to the builds. We are currently working to have a final complete translation. Thanks!
ca added to suite/locales/all-locales - SeaMonkey tinderboxen will start to report on http://tinderbox.mozilla.org/showbuilds.cgi?tree=Mozilla-l10n-ca from now on and produce nightlies that are put into http://ftp.mozilla.org/pub/mozilla.org/seamonkey/nightly/latest-trunk/ Note that open dependencies of bug 286110 will still cause known errors in those builds, namely in password manager, download manager and windows integration (strings for those still end up in en-US.jar instead of ca.jar until those old components get replaced with new ones). Additionally, note (as posted on m.d.l10n) that in a few days we will be stopping to generate L10n builds for SeaMonkey because the source is moving to Mercurial and the Mozilla 1.9.1 platform and we will pick up builds for locales when the infrastructure for this version of the platform is available and we can get our machines to work with that. I still found it important to get on you the train right now, so you get a number of builds in the few days between now and then and can fix possible bugs.