And yet another feature that will be available in next Koo version (5.0.5): this time we have  integrated spell checking (thanks to enchant) in text boxes (text-type fields in the model):

GTK client has had support for spell checking for quite a long time now, and web browsers support that too, but we also took care of activating spell checking for fields in the translation dialog:

and we activated spell checking for rich text widgets, too. 

Also, developers can force the language of a given textbox by using the special attribute "use" that we already use for setting stylesheets:

  <field name="text" use="{'lang': 'ca_ES'}"/>