diff --git a/domain_lang/domain_lang.admin.inc b/domain_lang/domain_lang.admin.inc
index e69de29..b056031 100644
--- a/domain_lang/domain_lang.admin.inc
+++ b/domain_lang/domain_lang.admin.inc
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * Domain language detection and selection page form callback.
+ */
+function domain_lang_detection_selection_form($form, $form_state, $domain) {
+
+  // Redirect user to related domain because only on it
+  // will be loaded proper variables by domain_conf module.
+  $current_domain = domain_get_domain();
+  if ($current_domain['domain_id'] !== $domain['domain_id']) {
+    domain_goto($domain);
+  }
+
+  module_load_include('inc', 'locale', 'locale.admin');
+
+  $form = locale_languages_configure_form();
+  $form['#submit'] = array('domain_lang_detection_selection_form_submit');
+  $form['domain_id'] = array(
+    '#type' => 'value',
+    '#value' => $domain['domain_id'],
+  );
+
+  return $form;
+}
+
+/**
+ * Domain language detection and selection form submit callback.
+ */
+function domain_lang_detection_selection_form_submit($form, &$form_state) {
+  $domain_id = (int) $form_state['values']['domain_id'];
+  $configurable_types = $form['#language_types'];
+
+  foreach ($configurable_types as $type) {
+    $negotiation = array();
+    $enabled_providers = $form_state['values'][$type]['enabled'];
+    $enabled_providers[LANGUAGE_NEGOTIATION_DEFAULT] = TRUE;
+    $providers_weight = $form_state['values'][$type]['weight'];
+
+    foreach ($providers_weight as $id => $weight) {
+      if ($enabled_providers[$id]) {
+        $provider = $form[$type]['#language_providers'][$id];
+        $provider['weight'] = $weight;
+        $negotiation[$id] = $provider;
+      }
+    }
+
+    domain_lang_negotiation_set($domain_id, $type, $negotiation);
+    domain_conf_variable_set($domain_id, "locale_language_providers_weight_$type", $providers_weight);
+  }
+
+  // Update non-configurable language types and the related language negotiation
+  // configuration.
+  domain_lang_types_set($domain_id);
+
+  drupal_set_message(t('Language negotiation configuration saved.'));
+}
diff --git a/domain_lang/domain_lang.info b/domain_lang/domain_lang.info
index e69de29..7714d1a 100644
--- a/domain_lang/domain_lang.info
+++ b/domain_lang/domain_lang.info
@@ -0,0 +1,7 @@
+name = Domain Language
+description = Adds language detection and selection functionality per domain basis.
+package = Domain Access
+core = 7.x
+
+dependencies[] = locale
+dependencies[] = domain_conf
diff --git a/domain_lang/domain_lang.install b/domain_lang/domain_lang.install
index e69de29..63a3eaa 100644
--- a/domain_lang/domain_lang.install
+++ b/domain_lang/domain_lang.install
@@ -0,0 +1,12 @@
+<?php
+
+/**
+ * Implements hook_install().
+ */
+function domain_lang_install() {
+  db_update('system')
+    ->expression('weight', 'weight + :weight', array(':weight' => 100))
+    ->condition('name', 'domain_lang')
+    ->condition('type', 'module')
+    ->execute();
+}
diff --git a/domain_lang/domain_lang.module b/domain_lang/domain_lang.module
index e69de29..235e0b3 100644
--- a/domain_lang/domain_lang.module
+++ b/domain_lang/domain_lang.module
@@ -0,0 +1,169 @@
+<?php
+
+/**
+ * Implements hook_menu().
+ */
+function domain_lang_menu() {
+  return array(
+    'admin/structure/domain/view/%domain/language-detect-select' => array(
+      'title' => 'Language Detect & Select',
+      'type' => MENU_LOCAL_TASK,
+      'page callback' => 'drupal_get_form',
+      'page arguments' => array('domain_lang_detection_selection_form', 4),
+      'access arguments' => array('administer domains'),
+      'file' => 'domain_lang.admin.inc',
+    ),
+  );
+}
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ */
+function domain_lang_form_locale_language_providers_session_form_alter(&$form, &$form_state, $form_id) {
+  _domain_lang_form_locale_language_providers_alter($form, $form_state);
+}
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ */
+function domain_lang_form_locale_language_providers_url_form_alter(&$form, &$form_state, $form_id) {
+  _domain_lang_form_locale_language_providers_alter($form, $form_state);
+}
+
+/**
+ * Alter language provider form callback.
+ */
+function _domain_lang_form_locale_language_providers_alter(&$form, &$form_state) {
+  $domain = domain_get_domain();
+
+  if ($domain['is_default'] || !isset($form['domain_settings']['domain_id'])) {
+    return FALSE;
+  }
+
+  $form['domain_settings']['#collapsed'] = TRUE;
+  $form['domain_settings']['#disabled'] = TRUE;
+  $form['domain_settings']['domain_id']['#default_value'] = $domain['domain_id'];
+  $form['#submit'][] = 'domain_lang_form_locale_language_providers_submit';
+  $form['domain_id'] = array(
+    '#type' => 'value',
+    '#value' => $domain['domain_id'],
+  );
+}
+
+/**
+ * Language provider form submit callback. Setup redirect to proper page.
+ */
+function domain_lang_form_locale_language_providers_submit($form, &$form_state) {
+  $form_state['redirect'] = 'admin/structure/domain/view/' . $form_state['values']['domain_id'] . '/language-detect-select';
+}
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ */
+function domain_lang_form_locale_languages_configure_form_alter(&$form, &$form_state, $form_id) {
+  $domain = domain_get_domain();
+
+  if ($domain['is_default']) {
+    return TRUE;
+  }
+  if (current_path() !== 'admin/config/regional/language/configure') {
+    return TRUE;
+  }
+
+  drupal_set_message(t(
+    'NOT USE this page. Open <a href="@url">Domain language detection and selection page</a> for setup.',
+    array(
+      '@url' => url('admin/structure/domain/view/' . $domain['domain_id'] . '/language-detect-select')
+    )), 'error');
+}
+
+/**
+ * Saves a list of language negotiation providers for requested domain.
+ *
+ * @param $domain_id
+ *   The unique domain ID that is being edited.
+ * @param $type
+ *   The language negotiation type.
+ * @param $language_providers
+ *   An array of language negotiation provider weights keyed by provider ID.
+ *   @see language_provider_weight()
+ */
+function domain_lang_negotiation_set($domain_id, $type, $language_providers) {
+  // Save only the necessary fields.
+  $provider_fields = array('callbacks', 'file', 'cache');
+
+  $negotiation = array();
+  $providers_weight = array();
+  $defined_providers = language_negotiation_info();
+  $default_types = language_types_configurable(FALSE);
+
+  // Initialize the providers weight list.
+  foreach ($language_providers as $id => $provider) {
+    $providers_weight[$id] = language_provider_weight($provider);
+  }
+
+  // Order providers list by weight.
+  asort($providers_weight);
+
+  foreach ($providers_weight as $id => $weight) {
+    if (isset($defined_providers[$id])) {
+      $provider = $defined_providers[$id];
+      // If the provider does not express any preference about types, make it
+      // available for any configurable type.
+      $types = array_flip(isset($provider['types']) ? $provider['types'] : $default_types);
+      // Check whether the provider is defined and has the right type.
+      if (isset($types[$type])) {
+        $provider_data = array();
+        foreach ($provider_fields as $field) {
+          if (isset($provider[$field])) {
+            $provider_data[$field] = $provider[$field];
+          }
+        }
+        $negotiation[$id] = $provider_data;
+      }
+    }
+  }
+
+  domain_conf_variable_set($domain_id, "language_negotiation_$type", $negotiation);
+}
+
+/**
+ * Updates the language type configuration for requested domain.
+ *
+ * @param $domain_id
+ *   The unique domain ID that is being edited.
+ */
+function domain_lang_types_set($domain_id) {
+  // Ensure that we are getting the defined language negotiation information. An
+  // invocation of module_enable() or module_disable() could outdate the cached
+  // information.
+  drupal_static_reset('language_types_info');
+  drupal_static_reset('language_negotiation_info');
+
+  // Determine which language types are configurable and which not by checking
+  // whether the 'fixed' key is defined. Non-configurable (fixed) language types
+  // have their language negotiation settings stored there.
+  $defined_providers = language_negotiation_info();
+  foreach (language_types_info() as $type => $info) {
+    if (isset($info['fixed'])) {
+      $language_types[$type] = FALSE;
+      $negotiation = array();
+      foreach ($info['fixed'] as $weight => $id) {
+        if (isset($defined_providers[$id])) {
+          $negotiation[$id] = $weight;
+        }
+      }
+      domain_lang_negotiation_set($domain_id, $type, $negotiation);
+    }
+    else {
+      $language_types[$type] = TRUE;
+    }
+  }
+
+  // Save language types.
+  domain_conf_variable_set($domain_id, 'language_types', $language_types);
+
+  // Ensure that subsequent calls of language_types_configurable() return the
+  // updated language type information.
+  drupal_static_reset('language_types_configurable');
+}