magento-test/app/code/Magento/Translation/Test/Mftf/Metadata/TranslationMeta.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->
<operations xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:mftf:DataGenerator/etc/dataOperation.xsd">
    <operation name="Translation" dataType="translation_operation" type="create" url="/translation/ajax/index" method="POST" auth="customerFormKey">
        <field key="customer_email">string</field>
        <field key="customer_password">string</field>
        <object key="translate" dataType="translation_operation">
            <object key="0" dataType="translation_operation_translate">
                <field key="original">string</field>
                <field key="custom">string</field>
            </object>
        </object>
    </operation>
</operations>