Variable interpolation

The I18N namespace allows some variable interpolation in your translations.

# english
msgid "welcome"
msgstr "Welcome ${name} you have ${n} mails!"

# french
msgid "welcome"
msgstr "Bienvenue ${name} vous avez recu ${n} messages!"

A template can use this interpolation as follows:

<span i18n:translate="welcome">
  <span i18n:name="name" tal:replace="user/name"/>
  you currently have
  <span i18n:name="n" tal:replace="user/unreadeMails"/>
  unread messages!

Because i18n:translate contains a value 'welcome', the template data will be ignored and the message given by gettext will be used instead.