gwibber doesn't work

I run Gwibber and I get this in terminal:

WARNING:root:desktopcouch is not available. . falling back to gconf

** (gwibber:4212): WARNING **: Trying to register gtype 'WnckWindowState' as flags when in fact it is of type 'GEnum'

** (gwibber:4212): WARNING **: Trying to register gtype 'WnckWindowActions' as flags when in fact it is of type 'GEnum'

** (gwibber:4212): WARNING **: Trying to register gtype 'WnckWindowMoveResizeMask' as flags when in fact it is of type 'GEnum'
Traceback (most recent call last):
File "/usr/bin/gwibber", line 57, in
client.Client()
File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 107, in __init__
self.w = GwibberClient()
File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 190, in __init__
self.setup_ui()
File "/usr/lib/python2.6/dist-packages/gwibber/client.py", line 262, in setup_ui
self.input = gwui.Input(self)
File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 395, in __init__
self.textview = InputTextView(client)
File "/usr/lib/python2.6/dist-packages/gwibber/gwui.py", line 455, in __init__
self.spell = gtkspell.Spell(self, None)
glib.GError: enchant error for language: en_US.UTF-8

how do I fix this??