hugo-theme-zzo/layouts/partials/footer/site-footer.html

<footer class="footer">
    {{ partial "footer/select-lang" . }}
    {{ partial "footer/links-social.html" . }}
    {{ partial "footer/go-to-top" . }}
    <hr />

    {{ if $.Param "showPoweredBy" }}
    <div class="footer__poweredby">
        {{ if $.Site.Copyright }}        
            <p class="caption">
                {{ with $.Site.Copyright }}{{ replace . "{year}" now.Year | markdownify}}{{ end }}
            </p>
        {{ end }}
        <p class="caption">Powered by <a href="https://gohugo.io/" rel="noreferrer">Hugo</a> and the <a href="https://github.com/zzossig/hugo-theme-zzo" rel="noreferrer">Zzo theme</a></p>
    </div>
    {{ end }}    
</footer>