first upload all files

Modules/Translation/Http/Controllers/Admin/TranslationController.php

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+<?php
+
+namespace Modules\Translation\Http\Controllers\Admin;
+
+use Modules\Translation\Entities\Translation;
+
+class TranslationController
+{
+    /**
+     * Display a listing of the resource.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function index()
+    {
+        $translations = Translation::retrieve();
+
+        return view('translation::admin.translations.index', compact('translations'));
+    }
+
+    /**
+     * Update the specified resource in storage.
+     *
+     * @param string $key
+     * @return \Illuminate\Http\Response
+     */
+    public function update($key)
+    {
+        Translation::firstOrCreate(['key' => $key])
+            ->translations()
+            ->updateOrCreate(
+                ['locale' => request('locale')],
+                ['value' => request('value', '')]
+            );
+
+        return trans('admin::messages.resource_saved', ['resource' => trans('translation::translations.translation')]);
+    }
+}