diff --git a/README.md b/README.md
index af0edbb9..61dfe4a3 100644
--- a/README.md
+++ b/README.md
@@ -119,3 +119,4 @@ With the function `register_hook` you can hook into several functions. The follo
 * `state-get`: modules can add values into the current state. Parameters: `state`: an object, which can be modified by modules.
 * `state-apply`: when a state is applied to the app. Parameters: `state`: state which should be applied.
 * `show-details`: called when details are being displayed. Parameters: data (see properties in doc/TwigJS.md), category, dom, callback.
+* `options_save`: called when options are saved. Parameters: options (the new object), old_options (before save)
diff --git a/src/language.js b/src/language.js
index e1c1185f..aaa651b0 100644
--- a/src/language.js
+++ b/src/language.js
@@ -111,10 +111,10 @@ register_hook('options_form', function (def) {
   }
 })
 
-register_hook('options_save', function (data) {
-  if ('data_lang' in data) {
-    if ('data_lang' in options && options.data_lang !== data.data_lang) {
-      tagTranslations.setTagLanguage(data.data_lang)
+register_hook('options_save', function (options, old_options) {
+  if ('data_lang' in options) {
+    if (old_options.data_lang !== options.data_lang) {
+      tagTranslations.setTagLanguage(options.data_lang)
       baseCategory.recalc()
     }
   }
diff --git a/src/options.js b/src/options.js
index 84ed0932..59fc6e8c 100644
--- a/src/options.js
+++ b/src/options.js
@@ -59,16 +59,17 @@ moduleOptions.submit = function (optionsForm) {
     }
   }
 
-  if (reload) {
-    location.reload()
-  }
-
   ajax('options_save', null, data, function (ret) {
-    call_hooks('options_save', data)
-
+    old_options = options
     options = data
 
     document.getElementById('content').className = prevPage
+
+    call_hooks('options_save', data, old_options)
+
+    if (reload) {
+      location.reload()
+    }
   })
 
   return false