<wpml-config>
    <custom-types>
        <custom-type translate="0">wpes_setting</custom-type>
    </custom-types>
    <shortcodes>
        <shortcode>
            <tag>wpes_search_form</tag>
            <attributes>
                <attribute>submit_button_label</attribute>
                <attribute>input_box_placeholder</attribute>
                <attribute>aria_label</attribute>
            </attributes>
        </shortcode>
    </shortcodes>
</wpml-config>