wpml-config.xml

<wpml-config>
    <custom-fields>
        <custom-field action="copy">_lesson_complexity</custom-field>
        <custom-field action="copy">_lesson_length</custom-field>
        <custom-field action="translate">_lesson_prerequisite</custom-field>
        <custom-field action="translate">_lesson_course</custom-field>
        <custom-field action="translate">_course_prerequisite</custom-field>
        <custom-field action="translate">_course_woocommerce_product</custom-field>
    </custom-fields>
	<custom-types>
		<custom-type translate="1">course</custom-type>
		<custom-type translate="1">lesson</custom-type>
		<custom-type translate="0">quiz</custom-type>
		<custom-type translate="0">question</custom-type>
		<custom-type translate="0">multiple_question</custom-type>
		<custom-type translate="0">sensei_message</custom-type>
	</custom-types>
	<taxonomies>
		<taxonomy translate="1">lesson-tag</taxonomy>
		<taxonomy translate="1">course-category</taxonomy>
	</taxonomies>
    <admin-texts>
        <key name="woothemes-sensei-settings">
            <key name="course_archive_more_link_text" />
            <key name="heading" />
        </key>
    </admin-texts>
</wpml-config>