How to use I18N with gettext

• set source in your i18n.yml file to gettext:

  all:
    default_culture: en
    source: gettext
  

• enabled i18n in settings.yml

  all:
    .settings:
      i18n: on
  

• place the I18nSaverFilter class from #253 in your <appdir>/lib directory
• active the filter in <appdir>/config/filters.yml:

  myI18nSaverFilter:
    class: I18nSaverFilter
  

• create a directory in <appdir>/i18n for each language you want to translate to
• create message.po, message.mo in this directory i.e.

  cd de
  touch messages.po messages.mo
  

• make them writeable by the webserver (the I18nSaverFilter will write untranslated string to this files while you browse your website):

  chmod 777 messages.po messages.mo
  

• translate the .po files (i.e. with http://www.poedit.net/, but there are loads of other tools)
• update messages.mo files with

  msgfmt messages.po
  

• i18n.yml is deprecated. please use factories.yml.