i18n: Translate theme text variable (#398)

Author: jpmckinney

pydata_sphinx_theme/_templates/navbar-nav.html

@@ -2,7 +2,7 @@
     {{ generate_nav_html("navbar", maxdepth=1, collapse=True, includehidden=True, titles_only=True) }}
     {% for external_link in theme_external_links %}
     <li class="nav-item">
-        <a class="nav-link nav-external" href="{{ external_link.url }}">{{ external_link.name }}<i class="fas fa-external-link-alt"></i></a>
+        <a class="nav-link nav-external" href="{{ external_link.url }}">{{ _(external_link.name) }}<i class="fas fa-external-link-alt"></i></a>
     </li>
     {% endfor %}
 </ul>

pydata_sphinx_theme/search-field.html

@@ -1,4 +1,4 @@
 <form class="bd-search d-flex align-items-center" action="{{ pathto('search') }}" method="get">
   <i class="icon fas fa-search"></i>
-  <input type="search" class="form-control" name="q" id="search-input" placeholder="{{ theme_search_bar_text }}" aria-label="{{ theme_search_bar_text }}" autocomplete="off" >
+  <input type="search" class="form-control" name="q" id="search-input" placeholder="{{ _(theme_search_bar_text) }}" aria-label="{{ theme_search_bar_text }}" autocomplete="off" >
 </form>