Use i18n to translate some strings

Hugo 0.17 allows for easy multi-lingual sites. Strings can be
translated either in the theme or in the site, and missing strings
will fall back to the default language.

See: https://github.com/spf13/hugo/blob/master/docs/content/content/multilingual.md

i18n/en.yaml

@@ -0,0 +1,14 @@
+- id: about
+  translation: "About"
+
+- id: recentPosts
+  translation: "Recent Posts"
+
+- id: readMore
+  translation: "Read more"
+
+- id: translations
+  translation: "Translations"
+
+- id: share
+  translation: "Share"

layouts/_default/single.html

@@ -8,7 +8,7 @@
         {{ .Content }}
 
         {{ if .IsTranslated }}
-        <h4>Translations</h4>
+        <h4>{{ i18n "translations" }}</h4>
           <ul>
           {{ range .Translations }}
             <li>

layouts/_default/summary.html

@@ -4,5 +4,5 @@
     <p class="blog-post-meta"><time datetime="{{ .Date.Format "2006-01-02T15:04:05Z07:00" }}">{{ .Date.Format .Site.Params.date_format }}</time> by {{ .Params.author | default .Site.Params.author }}{{ if or (.Params.categories) (.Params.tags) }} in {{ partial "meta-terms.html" . }}{{ end }}</p>
   </header>
   {{ .Summary }}
-  <a href='{{ .Permalink }}'>Read more →</a>
+  <a href='{{ .Permalink }}'>{{ i18n "readMore" }} →</a>
 </article> <!-- /.blog-post -->

layouts/partials/sharing-icons.html

@@ -1,7 +1,7 @@
         <hr>
         <footer>
           <header>
-            <h4>Share</h4>
+            <h4>{{ i18n "share" }}</h4>
           </header>
           <nav class="nav nav-inline">
           {{ if not (eq .Site.Params.sharingicons.facebook false) }}<a class="nav-item" href="https://www.facebook.com/sharer/sharer.php?u={{ .Permalink }}" title="Share on Facebook"><span class="fa fa-facebook fa-2x" aria-hidden="true"></span></a>{{ end }}

layouts/partials/sidebar.html

@@ -1,7 +1,7 @@
 <aside class="col-sm-3 offset-sm-1 blog-sidebar">
   {{ if isset .Site.Params.sidebar "about" }}
   <section class="sidebar-module sidebar-module-inset">
-    <h4>About</h4>
+    <h4>{{ i18n "about" }}</h4>
     <p>{{ .Site.Params.sidebar.about | markdownify }}</p>
   </section>
   {{ end }}
@@ -9,7 +9,7 @@
   {{ $num_recent_posts := (index .Site.Params.sidebar "num_recent_posts" | default 5) }}
 
   <section class="sidebar-module">
-    <h4>Recent Posts</h4>
+    <h4>{{ i18n "recentPosts" }}</h4>
     <ol class="list-unstyled">
       {{ range first $num_recent_posts (where .Site.Pages "Type" "post") }}
       <li><a href="{{.RelPermalink}}">{{.Title}}</a></li>