response['form_errors']= dict([(k, form.error_class.as_text(v)) for k, v in form.errors.items()])

from django.utils import simplejson
context['formset_errors']= simplejson.dumps(formset.errors)

[{"status": ["This field is required."]}, {"status": ["This field is required."]}, {"status": ["This field is required."]}, {"status": ["This field is required."]}, {"status": ["This field is required."]}, {"status": ["This field is required."]}, {"status": ["This field is required."]}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}]