diff --git a/CHANGELOG.md b/CHANGELOG.md
index 960876ab..816fcbf9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,13 @@
 
 
 
+<h2>Version 1.2.1 - 20/07/2024</h2>
+      <ul>
+        <li>Fixed changes in the ChatGPT web interface when importing in plain text [<a href="https://github.com/micz/ThunderAI/issues/87">#87</a>].</li>
+        <li>Added an option to the prompts to specify the default language for the response [<a href="https://github.com/micz/ThunderAI/issues/86">#86</a>].</li>
+        <li>Not adding to the prompt the statement about using the default language if asking for a translation [<a href="https://github.com/micz/ThunderAI/issues/85">#85</a>].</li>
+        <li><i>[Thunderbird 128+ only]</i> Added a warning message when closing the Custom Prompts page with unsaved changes [<a href="https://github.com/micz/ThunderAI/issues/88">#88</a>].</li>
+      </ul>
 <h2>Version 1.2.0 - 17/07/2024</h2>
     <ul>
       <li>If no default language is set in the options, the language present in the text sent to ChatGPT will be used [<a href="https://github.com/micz/ThunderAI/issues/53">#53</a>].</li>
diff --git a/_locales/de/messages.json b/_locales/de/messages.json
index 6486dfc2..dabc7ec9 100644
--- a/_locales/de/messages.json
+++ b/_locales/de/messages.json
@@ -382,5 +382,9 @@
   "currently_used_prompt": {
     "message": "Derzeit verwendeter Prompt-Name",
     "description": ""
+  },
+  "customprompts_form_label_define_response_lang": {
+    "message": "Definieren Sie die Antwortsprache im Prompt.",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 82ee1781..1d516cd8 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -382,5 +382,9 @@
   "currently_used_prompt": {
     "message": "Currently used prompt name",
     "description": ""
+  },
+  "customprompts_form_label_define_response_lang": {
+    "message": "Define the reponse languange in the prompt",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/_locales/fr/messages.json b/_locales/fr/messages.json
index 76919b58..6bd52602 100644
--- a/_locales/fr/messages.json
+++ b/_locales/fr/messages.json
@@ -382,5 +382,9 @@
   "currently_used_prompt": {
     "message": "Nom du prompt actuellement utilisé",
     "description": ""
+  },
+  "customprompts_form_label_define_response_lang": {
+    "message": "Définir la langue de réponse dans le prompt.",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/_locales/it/messages.json b/_locales/it/messages.json
index 3fee6be5..741b8af5 100644
--- a/_locales/it/messages.json
+++ b/_locales/it/messages.json
@@ -382,5 +382,9 @@
   "currently_used_prompt": {
     "message": "Nome del prompt attualmente utilizzato",
     "description": ""
+  },
+  "customprompts_form_label_define_response_lang": {
+    "message": "Definisci la lingua di risposta nel prompt.",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/customprompts/mzta-custom-prompts.html b/customprompts/mzta-custom-prompts.html
index 59e01931..fa8a17eb 100644
--- a/customprompts/mzta-custom-prompts.html
+++ b/customprompts/mzta-custom-prompts.html
@@ -51,6 +51,8 @@
                 <input type="checkbox" id="checkboxNeedSignatureNew" name="need_signature" value="1" tabindex="7"> <label for="checkboxNeedSignatureNew">__MSG_customPrompts_form_label_need_signature__</label>
                 <br>
                 <input type="checkbox" id="checkboxNeedCustomTextNew" name="need_custom_text" value="1" tabindex="8"> <label for="checkboxNeedCustomTextNew">__MSG_customPrompts_form_label_need_custom_text__</label>
+                <br>
+                <input type="checkbox" id="checkboxDefineResponseLangNew" name="define_response_lang" value="1" tabindex="8"> <label for="checkboxDefineResponseLangNew">__MSG_customPrompts_form_label_define_response_lang__</label>
             </td>
         </tr>
         <tr>
diff --git a/customprompts/mzta-custom-prompts.js b/customprompts/mzta-custom-prompts.js
index 779b59e1..1440506a 100644
--- a/customprompts/mzta-custom-prompts.js
+++ b/customprompts/mzta-custom-prompts.js
@@ -17,6 +17,7 @@
  */
 
 import { getPrompts, setDefaultPromptsProperties, setCustomPrompts, preparePromptsForExport, preparePromptsForImport } from "../js/mzta-prompts.js";
+import { isThunderbird128OrGreater } from "../js/mzta-utils.js";
 
 var promptsList = null;
 var somethingChanged = false;
@@ -114,6 +115,7 @@ document.addEventListener('DOMContentLoaded', async () => {
     var checkboxNeedSelectedNew = document.getElementById('checkboxNeedSelectedNew');
     var checkboxNeedSignatureNew = document.getElementById('checkboxNeedSignatureNew');
     var checkboxNeedCustomTextNew = document.getElementById('checkboxNeedCustomTextNew');
+    var checkboxDefineResponseLangNew = document.getElementById('checkboxDefineResponseLangNew');
 
     const btnAddNew = document.getElementById('btnAddNew');
     btnAddNew.addEventListener('click', (e) => {
@@ -130,6 +132,7 @@ document.addEventListener('DOMContentLoaded', async () => {
             need_selected: (checkboxNeedSelectedNew.checked) ? 1 : 0,
             need_signature: (checkboxNeedSignatureNew.checked) ? 1 : 0,
             need_custom_text: (checkboxNeedCustomTextNew.checked) ? 1 : 0,
+            define_response_lang: (checkboxDefineResponseLangNew.checked) ? 1 : 0,
             enabled: 1,
             position_compose: positionMax_compose + 1,
             position_display: positionMax_display + 1,
@@ -273,6 +276,7 @@ function showItemRowEditor(tr) {
     tr.querySelector('input.need_selected').disabled = false;
     tr.querySelector('input.need_signature').disabled = false;
     tr.querySelector('input.need_custom_text').disabled = false;
+    tr.querySelector('input.define_response_lang').disabled = false;
 }
 
 function hideItemRowEditor(tr) {
@@ -289,6 +293,7 @@ function hideItemRowEditor(tr) {
     tr.querySelector('input.need_selected').disabled = true;
     tr.querySelector('input.need_signature').disabled = true;
     tr.querySelector('input.need_custom_text').disabled = true;
+    tr.querySelector('input.define_response_lang').disabled = true;
 }
 
 // Confirm and log deletion action
@@ -354,7 +359,7 @@ function handleInputChange(e) {
 
 function loadPromptsList(values){
     let options = {
-        valueNames: [ { data: ['idnum'] }, 'is_default', 'id', 'name', 'text', 'type', 'action', 'position_compose', 'position_display', { name: 'need_selected', attr: 'checked_val'}, { name: 'need_signature', attr: 'checked_val'}, { name: 'need_custom_text', attr: 'checked_val'}, { name: 'enabled', attr: 'checked_val'} ],
+        valueNames: [ { data: ['idnum'] }, 'is_default', 'id', 'name', 'text', 'type', 'action', 'position_compose', 'position_display', { name: 'need_selected', attr: 'checked_val'}, { name: 'need_signature', attr: 'checked_val'}, { name: 'need_custom_text', attr: 'checked_val'}, { name: 'define_response_lang', attr: 'checked_val'}, { name: 'enabled', attr: 'checked_val'} ],
         item: function(values) {
             let type_output = '';
             switch(String(values.type)){
@@ -410,6 +415,8 @@ function loadPromptsList(values){
                     <br>
                     <input type="checkbox" class="need_custom_text" disabled> __MSG_customPrompts_form_label_need_custom_text__
                     <br>
+                    <input type="checkbox" class="define_response_lang" disabled> __MSG_customPrompts_form_label_define_response_lang__
+                    <br>
                     <input type="checkbox" class="enabled input_mod"> __MSG_customPrompts_form_label_enabled__
                     <span class="is_default hiddendata"></span>
                     <span class="position_compose hiddendata"></span>
@@ -547,6 +554,7 @@ function checkSelectedBoxes(checkboxes = null) {
             ...document.querySelectorAll('.need_selected[type="checkbox"]'),
             ...document.querySelectorAll('.need_signature[type="checkbox"]'),
             ...document.querySelectorAll('.need_custom_text[type="checkbox"]'),
+            ...document.querySelectorAll('.define_response_lang[type="checkbox"]'),
             ...document.querySelectorAll('.enabled[type="checkbox"]'),
         ];
     }
@@ -611,9 +619,11 @@ function clearMessage() {
 }
 
 
-// window.addEventListener('beforeunload', function (event) {
-//     // Check if any changes have been made
-//     if (somethingChanged) {
-//         event.preventDefault();
-//     }
-// });
\ No newline at end of file
+if(await isThunderbird128OrGreater()){
+    window.addEventListener('beforeunload', function (event) {
+        // Check if any changes have been made (Only for Thunderbird 128+ see https://github.com/micz/ThunderAI/issues/88)
+        if (somethingChanged) {
+            event.preventDefault();
+        }
+    });    
+}
diff --git a/js/mzta-chatgpt.js b/js/mzta-chatgpt.js
index 03140558..6a19bd7f 100644
--- a/js/mzta-chatgpt.js
+++ b/js/mzta-chatgpt.js
@@ -65,6 +65,7 @@ function chatgpt_getRegenerateButton() {
 async function chatgpt_getFromDOM(pos) {
     const responseDivs = document.querySelectorAll('div[data-testid*="conversation-turn"]:nth-child(odd)'),
           strPos = pos.toString().toLowerCase();
+          //console.log(">>>>>>>>>>>>> responseDivs.length: "+ responseDivs.length);
     let response = '';
     if (responseDivs.length) {
         if (/last|final/.test(strPos)){ // get last response
@@ -74,13 +75,9 @@ async function chatgpt_getFromDOM(pos) {
             let doc = parser.parseFromString(responseDivs[responseDivs.length - 1].innerHTML, 'text/html');
             if(!mztaKeepFormatting) {       // Return only TEXT
             // Select the div with class 'empty:hidden'
-                let divToRemove = doc.querySelector('div.empty\\\\:hidden');
-                if (divToRemove) {
-                    divToRemove.remove();
-                }
-                // Extract the new HTML string
-                responseDivs[responseDivs.length - 1].innerHTML = doc.body.innerHTML;
-                response = responseDivs[responseDivs.length - 1].textContent;
+                let correct_div = responseDivs[responseDivs.length - 1].querySelector('div[data-message-author-role="assistant"]');
+                response = correct_div.textContent;
+                //console.log(">>>>>>>>>> response: " + response);
                 response = response.replace(/^ChatGPT(?:ChatGPT)?/, ''); // strip sender name
                 response = response.trim().replace(/^"|"$/g, ''); // strip quotation marks
                 response = "<body><p>" + response + "</p></body>";
@@ -90,7 +87,6 @@ async function chatgpt_getFromDOM(pos) {
                 //console.log(">>>>>>>>> doc_response: " + JSON.stringify(doc_response.body.innerHTML));
                 replaceNewlinesWithBr(doc_response.body)
                 response = doc_response.body.innerHTML;
-                // response = responseDivs[responseDivs.length - 1].innerHTML;
             } else {                // Return HTML
                 // Tags to exclude
                 //console.log(">>>>>>>>> doc.body.innerHTML original: " + doc.body.innerHTML);
diff --git a/js/mzta-menus.js b/js/mzta-menus.js
index 707ebfc5..9b709e19 100644
--- a/js/mzta-menus.js
+++ b/js/mzta-menus.js
@@ -93,13 +93,16 @@ export class mzta_Menus {
             }
             //open chatgpt window
             //console.log("Click menu item...");
-            let prefs = await browser.storage.sync.get({default_chatgpt_lang: ''});
-            let chatgpt_lang = prefs.default_chatgpt_lang;
-            //console.log(" >>>>>>>>>>>> chatgpt_lang: " + chatgpt_lang);
-            if(chatgpt_lang === ''){
-                chatgpt_lang = 'Reply in the language it is written.';
-            }else{
-                chatgpt_lang = browser.i18n.getMessage("prompt_lang") + " " + chatgpt_lang + ".";
+            let chatgpt_lang = '';
+            if(String(curr_prompt.define_response_lang) == "1"){
+                let prefs = await browser.storage.sync.get({default_chatgpt_lang: ''});
+                chatgpt_lang = prefs.default_chatgpt_lang;
+                //console.log(" >>>>>>>>>>>> chatgpt_lang: " + chatgpt_lang);
+                if(chatgpt_lang === ''){
+                    chatgpt_lang = 'Reply in the same language.';
+                }else{
+                    chatgpt_lang = browser.i18n.getMessage("prompt_lang") + " " + chatgpt_lang + ".";
+                }
             }
     
             var fullPrompt = curr_prompt.text + (String(curr_prompt.need_signature) == "1" ? " " + await this.getDefaultSignature():"") + " " + chatgpt_lang + " \"" + body_text + "\" ";
diff --git a/js/mzta-prompts.js b/js/mzta-prompts.js
index 564a18b7..4f341200 100644
--- a/js/mzta-prompts.js
+++ b/js/mzta-prompts.js
@@ -44,6 +44,10 @@
     0: No custom text needed
     1: Custom text needed
 
+    Define response language (define_response_lang attribute):
+    0: Do not include a statement about the response language in the prompt.
+    1: Include a statement about the response language in the prompt.
+
     ================ USER PROPERTIES
     Enabled (enabled attribute):
     0: Disabled
@@ -67,6 +71,7 @@ const defaultPrompts = [
         need_selected: "0",
         need_signature: "1",
         need_custom_text: "0",
+        define_response_lang: "1",
         is_default: "1",
     },
     {
@@ -78,6 +83,7 @@ const defaultPrompts = [
         need_selected: "1",
         need_signature: "0",
         need_custom_text: "0",
+        define_response_lang: "1",
         is_default: "1",
     },
     {
@@ -89,6 +95,7 @@ const defaultPrompts = [
         need_selected: "1",
         need_signature: "0",
         need_custom_text: "0",
+        define_response_lang: "1",
         is_default: "1",
     },
     {
@@ -100,6 +107,7 @@ const defaultPrompts = [
         need_selected: "0",
         need_signature: "0",
         need_custom_text: "0",
+        define_response_lang: "1",
         is_default: "1",
     },
     {
@@ -111,6 +119,7 @@ const defaultPrompts = [
         need_selected: "0",
         need_signature: "0",
         need_custom_text: "0",
+        define_response_lang: "1",
         is_default: "1",
     },
     {
@@ -122,6 +131,7 @@ const defaultPrompts = [
         need_selected: "0",
         need_signature: "0",
         need_custom_text: "0",
+        define_response_lang: "0",
         is_default: "1",
     },
     {
@@ -133,6 +143,7 @@ const defaultPrompts = [
         need_selected: "1",
         need_signature: "0",
         need_custom_text: "0",
+        define_response_lang: "0",
         is_default: "1",
     },
 ];
diff --git a/js/mzta-utils.js b/js/mzta-utils.js
index fc87deee..2e359c13 100644
--- a/js/mzta-utils.js
+++ b/js/mzta-utils.js
@@ -87,6 +87,43 @@ export async function replaceBody(tabId, replyHtml) {
   await messenger.compose.setComposeDetails(tabId, {body: fullBody});
 }
 
+export function i18nConditionalGet(str) {
+  // if we are getting a string that starts with '__MSG_' and ends with '__' we return the translated string
+  // using the browser.i18n API
+  // else we return the original string
+  // Check if the string starts with '__MSG_' and ends with '__'
+  if (str.startsWith('__MSG_') && str.endsWith('__')) {
+      // Remove '__MSG_' from the beginning and '__' from the end
+      return browser.i18n.getMessage(str.substring(6, str.length - 2));
+  }
+  return str; // Return the original string if the conditions are not met
+}
+
+export async function isThunderbird128OrGreater(){
+  try {
+    const info = await browser.runtime.getBrowserInfo();
+    const version = info.version;
+    return compareThunderbirdVersions(version, '128.0') >= 0;
+  } catch (error) {
+    console.error('[ThunderAI] Error retrieving browser information:', error);
+    return false;
+  }
+}
+
+function compareThunderbirdVersions(v1, v2) {
+  const v1parts = v1.split('.').map(Number);
+  const v2parts = v2.split('.').map(Number);
+
+  for (let i = 0; i < Math.max(v1parts.length, v2parts.length); i++) {
+    const v1part = v1parts[i] || 0;
+    const v2part = v2parts[i] || 0;
+    if (v1part > v2part) return 1;
+    if (v1part < v2part) return -1;
+  }
+  return 0;
+}
+
+
 
 // The following methods are a modified version derived from https://github.com/ali-raheem/Aify/blob/13ff87583bc520fb80f555ab90a90c5c9df797a7/plugin/content_scripts/compose.js
 
@@ -135,15 +172,3 @@ const insertHtml = function (replyHtml, fullBody_string) {
   fullBody.body.insertBefore(fragment, fullBody.body.firstChild);
   return fullBody.body.innerHTML;
 }
-
-export function i18nConditionalGet(str) {
-  // if we are getting a string that starts with '__MSG_' and ends with '__' we return the translated string
-  // using the browser.i18n API
-  // else we return the original string
-  // Check if the string starts with '__MSG_' and ends with '__'
-  if (str.startsWith('__MSG_') && str.endsWith('__')) {
-      // Remove '__MSG_' from the beginning and '__' from the end
-      return browser.i18n.getMessage(str.substring(6, str.length - 2));
-  }
-  return str; // Return the original string if the conditions are not met
-}
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index df8f5f8f..c8df3d51 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
     "manifest_version": 2,
     "name": "ThunderAI",
     "description": "__MSG_extensionDescription__",
-    "version": "1.2.0",
+    "version": "1.2.1",
     "author": "Mic (m@micz.it)",
     "homepage_url": "https://micz.it/thunderbird-addon-thunderai/",
     "browser_specific_settings": {
diff --git a/options/mzta-release-notes.html b/options/mzta-release-notes.html
index 941d9d67..433d2c2e 100644
--- a/options/mzta-release-notes.html
+++ b/options/mzta-release-notes.html
@@ -7,6 +7,13 @@
   <body>
     <div id="miczBackPrefs"><a href="mzta-options.html">__MSG_backToOptionsText__</a></div>
     <div id="miczRelNotes"><h1>ThunderAI Release Notes</h1>
+      <h2>Version 1.2.1 - 20/07/2024</h2>
+      <ul>
+        <li>Fixed changes in the ChatGPT web interface when importing in plain text [<a href="https://github.com/micz/ThunderAI/issues/87">#87</a>].</li>
+        <li>Added an option to the prompts to specify the default language for the response [<a href="https://github.com/micz/ThunderAI/issues/86">#86</a>].</li>
+        <li>Not adding to the prompt the statement about using the default language if asking for a translation [<a href="https://github.com/micz/ThunderAI/issues/85">#85</a>].</li>
+        <li><i>[Thunderbird 128+ only]</i> Added a warning message when closing the Custom Prompts page with unsaved changes [<a href="https://github.com/micz/ThunderAI/issues/88">#88</a>].</li>
+      </ul>
       <h2>Version 1.2.0 - 17/07/2024</h2>
       <ul>
         <li>If no default language is set in the options, the language present in the text sent to ChatGPT will be used [<a href="https://github.com/micz/ThunderAI/issues/53">#53</a>].</li>