mailhandler and i18n: don't forget default command "language:"

In mailhandler, I use the default commands:

type: story
taxonomy: [Actueel]
status: 1
promote: 1
format: 1
moderate: 0
revision: 0
comment: 2
sticky: 0

These story nodes are set "promote to front page", but they do not appear on the front page "en/node" or "nl/node" (I use the languages "en" and "nl" in i18n).
The solution is to set a default command "language", e.g.

language: nl

To be added to the documentation... ?