Language packs for 16 languages available for Sunbird

Hi folks,
I meant to post this earlier, since a few days Stefan Sitter provides language packs for languages that have a working localization for Sunbird. We currently have language packs for the following languages:

  • Catalan (ca)
  • Czech (cs)
  • German (de)
  • Danish (da)
  • Spanish-Europe (es-ES)
  • Basque (eu)
  • French (fr)
  • Hungarian(hu)
  • Irish (ga-IE)
  • Italian (it)
  • Mongolian (mn)
  • Dutch (nl)
  • Polish (pl)
  • Russian (ru)
  • Slovenian (sl)
  • Slovakian (sk)

You can download and test these language packs from Stefan’s language pack website. Make sure to follow the instructions from that page to get Sunbird working in your language of choice.


  1. Ok, there are some bugs/issues with localization: I tried Slovenian lang pack over Sunbird and noticed:
    1 – upon installation of lang-pack and restart Sunbird starts in English, not lang-pack language; there is no way in setting that in the interface
    2 – Sunbird uses English categories names even with running other locale where those categories names are localized
    3 – main, built-in calendar is named Home, although run in other locale that should have a localized name?
    4 – in main calendar pane in day view the date above day name is displayed in US way (30/9) although in Slovenian/Europe it should be 9.30. Same goes for weekly view.
    5 – In javascript console I have a Warning: Expected color but found ‘null’. Error in parsing value for property ‘background-color’. Declaration dropped. chrome://calendar/content/preferences/editCategory.xul
    This was my first glance, hope you squash these bugs.
    Thanks, m.

  2. Re 1 – You could check if there is already an enhancement request for the Add-ons Manager filed. If you want to change the language via UI use the Quick Locale Switcher extension.
    Re 2 – Drawback of the lang pack usage. In the full localized build this should work.
    Re 3 – Using a different language will not change existing calendar names. What happens if you delete all calendars and restart Sunbird to re-create the default calendar?
    Re 4 – Bug 345643
    Re 5 – Can be ignored (Bug 349987)

  3. to enable language pack by starting Sunbird try it with command line parameter -uiLocale sl

  4. What’s Canadian? ;-) We speak English here, you know! ;-) Anyway, I think you meant Catalan.

  5. There is still spelling differences, Colour instead of color. There is a canadian english thunderbird dictionary if you would like to compare.

  6. please create shamsi(Jalali) date for Sunbird.

  7. Hi
    I am impressed, I would like to add: has there been any work done or localisation done for arabic / lunar calendar integration with the julian (solar) calendar. If not I would like to make a contribution, if you will guide me to the specs for localisation and so forth
    thanks and best regards

  8. Hi I check-in pa-IN locale for branch, how can build can enable to pick up translation with nightly build?

  9. A S Alam,
    please open a bug for the addition of the pa-IN locale in Sunbird and Lightning.

  10. Hi!
    Downloaded the Hungarian version to open an Outlook .ICS file.
    After I tried the English version too.
    In the Hungarian translation
    the time fields ‘From:’ and ‘To:’ of the Event window are translated ‘Sender’ and ‘Receipient’ :)
    The correct Hungarian is ‘Kezde?s:’ and ‘Ve?ge:’ (the question mark stends for an acute accent on the e like in cafe?)

  11. I posted the comment above hoping it will reach somebody who can change it. Or somebody send me the Hungarian text file and I change it :)