If label of field has suffix with language, you can fix it, for example:

    class MyModelForm(models.ModelForm):
        class Meta:
            model = MyModel
            _mt_fields = mt_fields(('title', 'description'), nomaster=True)
            fields = _mt_fields

        def __init__(self, *args, **kwargs):
            super(ItemCategoryEditForm, self).__init__(*args, **kwargs)

            for field_name in self.Meta._mt_fields:
                mt_modelform_field_restore_original_label(self.fields[field_name], make_capfirst=True)

def mt_modelform_field_restore_original_label(field, make_capfirst=False):
    """
    If label of field has suffix with language, you can fix it, for example:

    class MyModelForm(models.ModelForm):
        class Meta:
            model = MyModel
            _mt_fields = mt_fields(('title', 'description'), nomaster=True)
            fields = _mt_fields

        def __init__(self, *args, **kwargs):
            super(ItemCategoryEditForm, self).__init__(*args, **kwargs)

            for field_name in self.Meta._mt_fields:
                mt_modelform_field_restore_original_label(self.fields[field_name], make_capfirst=True)
    """
    field.label = field.label._proxy____args[0]._proxy____args[0]
    if make_capfirst:
        field.label = capfirst(field.label)