Fix for translation not working in graphql

src/Plugin/InitGraphQlTranslations.php

@@ -0,0 +1,93 @@
+<?php
+/**
+ * ScandiPWA_CmsGraphQl
+ *
+ * @category    Scandiweb
+ * @package     ScandiPWA_CmsGraphQl
+ * @copyright   Copyright (c) 2022 Scandiweb, Ltd (https://scandiweb.com)
+ */
+declare(strict_types=1);
+
+namespace ScandiPWA\CmsGraphQl\Plugin;
+
+use Exception;
+use Magento\Framework\App\Area;
+use Magento\Framework\App\FrontControllerInterface;
+use Magento\Framework\App\AreaList;
+use Magento\Framework\App\RequestInterface;
+use Magento\Framework\App\State;
+use Magento\Framework\Exception\LocalizedException;
+use ScandiPWA\PersistedQuery\Plugin\PersistedQuery;
+
+/**
+ * Class InitGraphQlTranslations
+ *
+ * A fix for https://github.com/magento/magento2/issues/31351
+ *
+ * @see \Magento\Framework\App\Action\Plugin\Design
+ * @see \Magento\Webapi\Controller\Soap
+ * @package ScandiPWA\CmsGraphQl\Plugin
+ */
+class InitGraphQlTranslations
+{
+    /**
+     * Application
+     *
+     * @var AreaList
+     */
+    protected $areaList;
+
+    /**
+     * State
+     *
+     * @var State
+     */
+    protected $appState;
+
+    /**
+     * @param AreaList $areaList
+     * @param State $appState
+     */
+    public function __construct(
+        AreaList $areaList,
+        State $appState
+    ) {
+        $this->areaList = $areaList;
+        $this->appState = $appState;
+    }
+
+    /**
+     * @param FrontControllerInterface $subject
+     * @param RequestInterface $request
+     *
+     * @return void
+     * @throws Exception
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function beforeDispatch(
+        FrontControllerInterface $subject,
+        RequestInterface $request
+    ) {
+        $area = $this->areaList->getArea($this->appState->getAreaCode());
+        if ($area) {
+            $area->load(Area::PART_TRANSLATE);
+        }
+    }
+
+    /**
+     * @param PersistedQuery $subject
+     * @param RequestInterface $request
+     * @return void
+     * @throws LocalizedException
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function beforeProcessRequest(
+        PersistedQuery $subject,
+        RequestInterface $request
+    ) {
+        $area = $this->areaList->getArea($this->appState->getAreaCode());
+        if ($area) {
+            $area->load(Area::PART_TRANSLATE);
+        }
+    }
+}

src/etc/graphql/di.xml

@@ -32,4 +32,13 @@
             </argument>
         </arguments>
     </virtualType>
+
+    <type name="Magento\GraphQl\Controller\GraphQl">
+        <plugin name="graphql_init_translations"
+                type="ScandiPWA\CmsGraphQl\Plugin\InitGraphQlTranslations"/>
+    </type>
+    <type name="ScandiPWA\PersistedQuery\Plugin\PersistedQuery">
+        <plugin name="graphql_init_translations"
+                type="ScandiPWA\CmsGraphQl\Plugin\InitGraphQlTranslations"/>
+    </type>
 </config>