Add the codes for unlisted languages to languages list (#546)

* Add the codes for unlisted languages to languages list

* Add the codes for unlisted languages to languages list

* Add article page for unlisted languages

* Show unlisted languages in code tags

* Show unlisted languages in code tagsand add a page for each one

* Remove unecessary imports

* Remove additional space from slugify

---------

Co-authored-by: Tovmas <tharrison748@gmail.com>

_layouts/api.html

@@ -136,7 +136,6 @@ <h2>Language support</h2>
       <ul>
         {% for language in page.supported_languages %}
           <li>
-            {% if language.slug %}
             <a href="/{{ language.slug }}">
               <code>{{ language.normalized_code }}</code>
               {{ language.name }}
@@ -147,14 +146,7 @@ <h2>Language support</h2>
               {% if language.normalized_code != language.code %}
                 ⚠️ {{ page.title }} uses <code>{{ language.code }}</code>.
               {% endif %}
-            {% else %}
-            <a href="https://en.wikipedia.org/wiki/ISO_639:{{ language.base_code }}" target="_blank">
-              <code>{{ language.code }}</code>
-              {% if language.variant_name %}
-                | {{ language.variant_name }}
-              {% endif %}
             </a>
-            {% endif %}
           </li>
         {% endfor %}
       </ul>

_layouts/language.html

@@ -3,6 +3,7 @@
 parent: Languages
 ---
 
+
 <h1>
   {{ page.title }}
 </h1>
@@ -12,6 +13,18 @@ <h2>
 
 <hr/>
 
+{% unless page.names %}
+  <blockquote>
+    <p>
+      This language has not yet been fully added to Machine Translate.
+
+      You can add it to Machine Translate by getting the name, language family, script and typology to <a target="_blank" href="https://github.com/machinetranslate/machinetranslate.org/blob/master/_data/languages.json">languages.json</a> and submitting a pull request.
+
+      You may be able to find this information in  <a target="_blank" href="https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes#{{ page.codes }}">its Wikipedia article.</a>
+    </p>
+  </blockquote>
+{% endunless %}
+
 <p>
   Machine translation for the <strong>{{ page.title }}</strong> language is supported by <a href="#machine-translation">{{ page.supported_apis | size }} machine translation APIs</a>.
 </p>
@@ -32,7 +45,7 @@ <h2>
     <dt>Language family</dt>
     <dd>
       {% for family in page.family %}
-       <a href="/{{ family.slug }}">{{ family.name }}</a> {% unless forloop.last %}<{% endunless %}
+      <a href="/{{ family.slug }}">{{ family.name }}</a> {% unless forloop.last %}<{% endunless %}
       {% endfor %}
     </dd>
 
@@ -47,7 +60,7 @@ <h2>
     <dt>Locale variants</dt>
     <dd>
       {% for variant in page.territories %}
-       <code style="white-space: nowrap;">{{ page.codes | first | append: '-' | append: variant }}</code>{% unless forloop.last %}{% endunless %}
+      <code style="white-space: nowrap;">{{ page.codes | first | append: '-' | append: variant }}</code>{% unless forloop.last %}{% endunless %}
       {% endfor %}
     </dd>