Add a multilingual section to the README.

layouts/partials/language-selector.html

@@ -1,21 +1,16 @@
 <h2 class="visually-hidden">{{ i18n "lang_select_title" }}</h2>
 <nav class="language-selector layout__language-selector" role="navigation">
 <ul class="navbar">
-
 {{ if .IsTranslated -}}
 {{ range .Translations }}
 <li><a rel="alternate" href="{{ .RelPermalink }}" hreflang="{{ .Lang }}" lang="{{ .Lang }}">{{ .Site.Language.Params.LanguageName }}</a></li>
 {{ end -}}
-
 {{ else -}}
-
 {{ range .Site.Languages -}}
 {{ if ne $.Site.Language.Lang .Lang }}
 <li><a rel="alternate" href="/{{ .Lang }}" hreflang="{{ .Lang }}" lang="{{ .Lang }}">{{ .Params.LanguageName }}</a></li>
 {{ end -}}
 {{ end -}}
-
-
 {{ end -}}
 </ul>
 </nav>