web/web_translate_dialog/view/web_translate.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2012 Guewen Baconnier (Camptocamp SA)
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->

<odoo>
    <template id="assets_backend" name="web_translate_dialog assets"
            inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
            <script type="text/javascript"
                    src="/web_translate_dialog/static/src/js/web_translate_dialog.js"/>
            <link rel="stylesheet" id="translate-dialog-stylesheet"
                href="/web_translate_dialog/static/src/css/base.css"/>
        </xpath>
    </template>
</odoo>