diff --git a/components/BaseController.php b/components/BaseController.php
index 83c0cff..d0f8924 100644
--- a/components/BaseController.php
+++ b/components/BaseController.php
@@ -11,6 +11,7 @@
 use humhub\components\Controller;
 use humhub\modules\content\models\Content;
 use humhub\modules\rest\components\auth\ImpersonateAuth;
+use humhub\modules\rest\components\behaviors\LanguagePickerBehavior;
 use humhub\modules\rest\components\User as UserComponent;
 use humhub\modules\rest\components\auth\JwtAuth;
 use humhub\modules\rest\controllers\auth\AuthController;
@@ -81,6 +82,9 @@ public function behaviors()
                     ]]
                 ),
             ],
+            'languagePicker' => [
+                'class' => LanguagePickerBehavior::class,
+            ]
         ], parent::behaviors());
     }
 
diff --git a/components/behaviors/LanguagePickerBehavior.php b/components/behaviors/LanguagePickerBehavior.php
new file mode 100644
index 0000000..e043d11
--- /dev/null
+++ b/components/behaviors/LanguagePickerBehavior.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace humhub\modules\rest\components\behaviors;
+
+use Yii;
+use yii\base\Behavior;
+use yii\helpers\ArrayHelper;
+use yii\web\Controller;
+
+class LanguagePickerBehavior extends Behavior
+{
+    public function events()
+    {
+        return [
+            Controller::EVENT_BEFORE_ACTION => 'pickLanguage',
+        ];
+    }
+
+    public function pickLanguage()
+    {
+        if (
+            empty(Yii::$app->request->acceptableLanguages) &&
+            $userLanguage = ArrayHelper::getValue(Yii::$app->user->identity, 'language')
+        ) {
+            Yii::$app->language = $userLanguage;
+        }
+    }
+}
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 229cf5b..8cfc8d7 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,6 +1,10 @@
 Changelog
 =========
 
+0.10.2 (unreleased)
+----------------------
+- Enh #175: User language will be used by default
+
 0.10.1 (July 31, 2024)
 ----------------------
 - Enh #173: Added possibility to change `created_at` of `content`
diff --git a/docs/MANUAL.md b/docs/MANUAL.md
index e5c85de..ea7a372 100644
--- a/docs/MANUAL.md
+++ b/docs/MANUAL.md
@@ -8,6 +8,10 @@ Following RESTful API endpoints are available.
 
 The base url for all APIs is: `https://yourhost/api/v1/`
 
+**Language**
+
+Logged-in user's language will be used. Can be overwritten by `Accept-Language` header.
+
 
 **Core APIs:**
 
diff --git a/module.json b/module.json
index a5a35e0..be97a9e 100644
--- a/module.json
+++ b/module.json
@@ -5,7 +5,7 @@
     "keywords": [
         "api", "rest"
     ],
-    "version": "0.10.1",
+    "version": "0.10.2",
     "homepage": "https://github.com/humhub/rest",
     "humhub": {
         "minVersion": "1.16"