added language files and strings

resources/lang/de/keyboard-navigation.php

+<?php
+
+return [
+    'keyboard-nav-title' => 'Tastatur-Navigation',
+    'focus-results'      => 'Zu den Ergebnissen springen',
+    'focus-settings'     => 'Zu den Sucheinstellungen springen',
+    'focus-navigation'   => 'Zu der Seitennavigation springen',
+    'keyboard-nav-hint'  => 'Tipp: Drücken Sie die Escape-Taste um in diese Box zurückzugelangen und zum schließen aller ausklappbaren Menüs.'
+];

resources/lang/en/keyboard-navigation.php

+<?php
+
+return [
+    'keyboard-nav-title' => 'Keyboard navigation',
+    'focus-results'      => 'Jump to results',
+    'focus-settings'     => 'Jump to search settings',
+    'focus-navigation'   => 'Jump to page navigation',
+    'keyboard-nav-hint'  => 'Hint: Press the escape key to return to this box and to collapse all menus.'
+];
\ No newline at end of file

resources/views/layouts/keyboardNavBox.blade.php

 <div id="keyboard-nav-info" tabindex="0">
     <div class="keyboard-nav-info-content">
         <div class="keyboard-nav-info-header">
-            <h5 class="keyboard-nav-info-title">Tastatur-Navigation</h5>
+            <h5 class="keyboard-nav-info-title">{{ trans('keyboard-navigation.keyboard-nav-title') }}</h5>
             <div class="keyboard-nav-info-body">
                 <ul>
-                    <li><a href="#" id="results-nav" onclick="focusResults()" tabindex="1">Zu den Ergebnissen springen</a></li>
-                    <li><a href="#" id="settings-nav" onclick="focusSettings()" tabindex="2">Zu den Sucheinstellungen springen</a></li>
-                    <li><a href="#" id="site-nav" onclick="focusNavigation()" tabindex="3">Zu der Seitennavigation springen</a></li>
+                    <li><a href="#" id="results-nav" onclick="focusResults()" tabindex="1">{{ trans('keyboard-navigation.focus-results') }}</a></li>
+                    <li><a href="#" id="settings-nav" onclick="focusSettings()" tabindex="2">{{ trans('keyboard-navigation.focus-settings') }}</a></li>
+                    <li><a href="#" id="site-nav" onclick="focusNavigation()" tabindex="3">{{ trans('keyboard-navigation.focus-navigation') }}</a></li>
                 </ul>
-                <p>Tipp: Drücken Sie die Escape-Taste um in diese Box zurückzugelangen und zum schließen aller ausklappbaren Menüs.</p>
+                <p>{{ trans('keyboard-navigation.keyboard-nav-hint') }}</p>
             </div>
         </div>
     </div>