diff --git a/static/aerbimJS.js b/static/aerbimJS.js
index 90cdc0a..fe38890 100644
--- a/static/aerbimJS.js
+++ b/static/aerbimJS.js
@@ -38,12 +38,8 @@ function renderContent (el=null) {
     } else {
         data['section_url'] = el.dataset['url']
     }
-    let language = document.querySelector(".name_language").innerHTML
-    if (language.includes("ru")){
-        data['lang'] = 'ru'
-    } else if (language.includes("en")){
-        data['lang'] = 'en'
-    }
+    let language = $('html').attr('lang');
+    data['lang'] = language
     $.ajax({
         headers: { "X-CSRFToken": $('input[name=csrfmiddlewaretoken]').val() },
         url: '/get_content_for_section/',
@@ -60,7 +56,6 @@ function renderContent (el=null) {
             window.scrollTo(0, 0);
             let lang = getLang()
             replaceHrefOnOnclick()
-
             if (el){
                 history.pushState({
                         'section':data['section_url']
@@ -137,15 +132,12 @@ function select_language (el) {
         select = document.querySelector(".name_language.curtain")
     }
     select.innerHTML = txt
-    let lang_f_replace = ''
-    if (window.location.href.includes('ru')){
-        lang_f_replace = 'ru'
-    } else {
-        lang_f_replace = 'en'
-    }
+    let lang_f_replace = getLang()
+    lang_f_check = txt.toLowerCase()
+    // txt.toLowerCase() is selected lang:138
     window.location.href = window.location.href.replace(`${lang_f_replace}`,txt.toLowerCase())
     history.pushState({
-        'lang':txt
+        'lang':lang_f_replace
     },null,window.location.href.replace(`${lang_f_replace}`,txt.toLowerCase()))
     open_select_language()
 }
diff --git a/templates/tb_base.html b/templates/tb_base.html
index 55e497c..2c69a92 100644
--- a/templates/tb_base.html
+++ b/templates/tb_base.html
@@ -16,6 +16,9 @@
         <link rel="stylesheet" href="{% static "aerbimCSSMOBILE.css" %}">
         <script src="{% static "jquery_v3_6_4.js" %}"></script>
         <script src="{% static "aerbimJS.js" %}"></script>
+        <script>
+            lang_f_check = ''
+        </script>
         <meta name="viewport" content="width=100%,maximum-scale=5,minimum-scale=1,initial-scale=1">
 
     </head>