fix default iceweasel spelling language
Logged in with the default (English) settings.
Visited an English speaking open-publishing website (http://atlanta.indymedia.org/), started to publish => dictionary is automatically set to French (Luxembourg) in the main textarea.
Looking around on the web, it looks like it's expected that iceweasel picks any seemingly random dictionary as the default one.
bugfix/fix_default_iceweasel_spelling_language, done in Tails 0.17.
But the fix is not perfect, see "select localized spelling dictionary in Iceweasel":./select_localized_spelling_dictionary_in_Iceweasel.html.