diff --git a/libs/ngx-facebook-messenger/src/lib/constant/customer-chat.constant.ts b/libs/ngx-facebook-messenger/src/lib/constant/customer-chat.constant.ts
index e2368a9..60cdda1 100644
--- a/libs/ngx-facebook-messenger/src/lib/constant/customer-chat.constant.ts
+++ b/libs/ngx-facebook-messenger/src/lib/constant/customer-chat.constant.ts
@@ -27,3 +27,6 @@ export enum SIZE_BUTTON_DESKTOP {
 	STANDARD = 'STANDARD_DESKTOP',
 	COMPACT = 'COMPACT_DESKTOP'
 }
+
+
+export const DEFAULT_GREETING = 'Hello, how can we help you?';
\ No newline at end of file
diff --git a/libs/ngx-facebook-messenger/src/lib/ngx-facebook-messenger.component.ts b/libs/ngx-facebook-messenger/src/lib/ngx-facebook-messenger.component.ts
index 3ca7a56..3ef1d51 100644
--- a/libs/ngx-facebook-messenger/src/lib/ngx-facebook-messenger.component.ts
+++ b/libs/ngx-facebook-messenger/src/lib/ngx-facebook-messenger.component.ts
@@ -16,6 +16,7 @@ import {
 
 import {
   CUSTOMER_CHAT,
+  DEFAULT_GREETING,
   SIZE_BUTTON_DESKTOP,
   SIZE_BUTTON_MOBILE,
   STYLE_BUTTON,
@@ -249,6 +250,7 @@ export class NgxFacebookMessengerComponent implements OnInit, OnChanges {
    * The function injects the Facebook SDK asynchronously into the document.
    */
   private injectFbSdkAsync(): void {
+    const language = this.ngxFacebookMessengerOptions?.language ?? 'en_US';
     const fjs = this.document.getElementsByTagName('script')[0];
     if (this.document.getElementById('facebook-jssdk')) return;
     const js = this.document.createElement('script');
@@ -256,7 +258,7 @@ export class NgxFacebookMessengerComponent implements OnInit, OnChanges {
     js.async = false;
     js.defer = false;
     js.crossOrigin = 'anonymous';
-    js.src = 'https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js';
+    js.src = `https://connect.facebook.net/${language}/sdk/xfbml.customerchat.js`;
     fjs?.parentNode?.insertBefore(js, fjs);
   }
 
@@ -277,9 +279,23 @@ export class NgxFacebookMessengerComponent implements OnInit, OnChanges {
       'page_id',
       this.ngxFacebookMessengerOptions.page_id
     );
+
     fbCustomerChat.setAttribute('attribution', 'biz_inbox');
 
+    fbCustomerChat.setAttribute(
+      'logged_in_greeting',
+      this.ngxFacebookMessengerOptions?.initPluginOptions?.logged_in_greeting ||
+        DEFAULT_GREETING
+    );
+
+    fbCustomerChat.setAttribute(
+      'logged_out_greeting',
+      this.ngxFacebookMessengerOptions?.initPluginOptions
+        ?.logged_out_greeting || DEFAULT_GREETING
+    );
+
     bodyElement.appendChild(fbRootElement);
+
     bodyElement.appendChild(fbCustomerChat);
   }
 
diff --git a/libs/ngx-facebook-messenger/src/lib/types/ngx-facebook-messenger.interface.ts b/libs/ngx-facebook-messenger/src/lib/types/ngx-facebook-messenger.interface.ts
index 5398b2c..b17b8d6 100644
--- a/libs/ngx-facebook-messenger/src/lib/types/ngx-facebook-messenger.interface.ts
+++ b/libs/ngx-facebook-messenger/src/lib/types/ngx-facebook-messenger.interface.ts
@@ -10,6 +10,11 @@ export interface NgxFacebookMessengerOptions {
    * Your required page_id for correctly work of real plugin facebook messenger
    */
   page_id: string;
+  /**
+   * Optional option for defined language support by facebook plugin (review your language in documentation)
+   * @default 'en_US'
+   */
+  language?: string;
   /**
    *  Init Plugin Options
    */
@@ -25,6 +30,16 @@ export interface NgxFacebookMessengerOptions {
      * @default 600
      */
     debounceTime?: number;
+    /**
+     * When the user is logged with your account show a greeting text in the Facebook Plugin Messenger
+     * @default 'Hello, how can we help you?'
+     */
+    logged_in_greeting?: string;
+    /**
+     * When the user not logged with your account show a greeting text in the Facebook Plugin Messenger
+     * @default 'Hello, how can we help you?'
+     */
+    logged_out_greeting?: string;
   };
   /**
    * Button Options for customization similar to a Facebook Plugin Official