Fix English language string when feedback from AI Tool fails

lang/en/qtype_aitext.php

@@ -74,7 +74,7 @@
 $string['err_minwordlimitnegative'] = 'Minimum word limit cannot be a negative number';
 $string['err_nofeedback'] = 'No feedback was returned from the AI. The response could not be graded automatically.';
 $string['err_parammissing'] = 'Invalid parameters. Make sure you have a sample answer and prompt';
-$string['err_retrievingfeedback'] = 'Error retrieving feedback vom KI-Tool: {$a}';
+$string['err_retrievingfeedback'] = 'Error retrieving feedback from AI Tool: {$a}';
 $string['err_retrievingfeedback_checkconfig'] = 'Unable to retrieve feedback. AI System Configuration might be wrong, contact your Administrator.';
 $string['err_retrievingtranslation'] = 'Error retrieving translation: {$a}';
 $string['expertmodeconfirm'] = 'This will replace the current prompt with the expert mode template.<br><br><strong>What is expert mode?</strong><br>In expert mode, you have full control over the entire AI prompt. The central template is ignored and your prompt is sent directly to the AI.<br><br><strong>Available placeholders:</strong><ul><li><code>{{response}}</code> - The student\'s answer (required to activate expert mode)</li><li><code>{{questiontext}}</code> - The question text</li><li><code>{{markscheme}}</code> - The grading criteria</li><li><code>{{language}}</code> - The user\'s language for the response</li><li><code>{{role}}</code> - The role description from the central template (currently: <em>"{$a}"</em>)</li></ul><strong>Note:</strong> The <code>{{role}}</code> placeholder inserts the role prompt defined in the central template. You can either use this placeholder or write your own role description directly in your prompt.<br><br>Continue?';