wpml-config.xml - theme ronneby

<wpml-config>
    <custom-types>
        <custom-type translate="1">my-product</custom-type>
        <custom-type translate="1">layerslider</custom-type>
        <custom-type translate="1">revslider</custom-type>
        <custom-type translate="1">timeline</custom-type>
    </custom-types>
    <taxonomies>
        <taxonomy translate="1">my-product_category</taxonomy>
    </taxonomies>
    <!---  the new part - reference: https://wpml.org/forums/topic/cant-translate-footer-copywrite-message/ -->
    <admin-texts>
        <key name="ronneby">
            <key name="copyright_footer"/>
        </key>
    </admin-texts>

</wpml-config>