odoo/addons/auth_signup/static/src/xml/auth_signup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- vim:fdl=1: -->
<templates id="template" xml:space="preserve">

    <t t-extend="Login">
        <t t-jquery="form ul:first li:first" t-operation="before">
            <li class="oe_signup">
                <input name="signup" type="checkbox" value="check_signup"/>
                Create a new account
            </li>
            <li class="oe_signup">Name</li>
            <li class="oe_signup">
                <input name="name" type="text"/>
            </li>
        </t>
        <t t-jquery="form ul:first li:contains('Username')" t-operation="replace">
            <li>Username <span class="oe_signup">(Email)</span></li>
        </t>
        <t t-jquery="form ul:first li:last" t-operation="before">
            <li class="oe_signup">Confirm Password</li>
            <li class="oe_signup">
                <input name="confirm_password" type="password"/>
            </li>
        </t>
    </t>

</templates>