diff --git a/src/SpreadsheetParser.php b/src/SpreadsheetParser.php
index e23330c..72a20a4 100644
--- a/src/SpreadsheetParser.php
+++ b/src/SpreadsheetParser.php
@@ -5,7 +5,6 @@
 namespace Orkhanahmadov\SpreadsheetTranslations;
 
 use Illuminate\Contracts\Config\Repository;
-use Illuminate\Support\Arr;
 use Illuminate\Support\Collection;
 use PhpOffice\PhpSpreadsheet\Exception;
 use PhpOffice\PhpSpreadsheet\Reader\Xlsx;
@@ -67,7 +66,7 @@ protected function parseRow(Row $row): void
         // get value from key column
         $translationKey = $this->parseTranslationKey($row->getColumnIterator());
 
-        // ignore row if filename or identifier is empty
+        // ignore row if translation key is empty
         if (empty($translationKey)) {
             return;
         }
@@ -77,11 +76,7 @@ protected function parseRow(Row $row): void
         /*
          * [
          *   'en' => [
-         *      'auth' => [
-         *         'login' => [
-         *             'title' => 'This is title translation for English',
-         *         ],
-         *      ]
+         *      'auth.login.title' => 'This is title translation for English',
          *    ]
          * ]
          */
@@ -92,7 +87,7 @@ protected function parseRow(Row $row): void
                 continue;
             }
 
-            Arr::set($this->translations[$locale], $translationKey, $value);
+            $this->translations[$locale][$translationKey] = $value;
         }
     }
 
diff --git a/tests/SpreadsheetParserTest.php b/tests/SpreadsheetParserTest.php
index ca0063f..3f8a460 100644
--- a/tests/SpreadsheetParserTest.php
+++ b/tests/SpreadsheetParserTest.php
@@ -26,8 +26,8 @@ public function testParsesListedLocaleTranslations(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => ['welcome' => 'Welcome'],
-                    'dashboard' => ['statistics' => 'Statistics'],
+                    'login.welcome' => 'Welcome',
+                    'dashboard.statistics' => 'Statistics',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -45,12 +45,8 @@ public function testParsesMultiDimensionalTranslations(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                        'form' => [
-                            'first_name' => 'First name',
-                        ],
-                    ],
+                    'login.welcome' => 'Welcome',
+                    'login.form.first_name' => 'First name',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -67,9 +63,7 @@ public function testIgnoresIrrelevantColumns(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                    ],
+                    'login.welcome' => 'Welcome',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -89,22 +83,14 @@ public function testCanParseMultipleLocaleTranslations(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                        'form' => [
-                            'first_name' => 'First name',
-                        ],
-                    ],
-                    'dashboard' => ['statistics' => 'Statistics'],
+                    'login.welcome' => 'Welcome',
+                    'login.form.first_name' => 'First name',
+                    'dashboard.statistics' => 'Statistics',
                 ],
                 'de' => [
-                    'login' => [
-                        'welcome' => 'Wilkommen',
-                        'form' => [
-                            'first_name' => 'Vorname',
-                        ],
-                    ],
-                    'dashboard' => ['statistics' => 'Statistik'],
+                    'login.welcome' => 'Wilkommen',
+                    'login.form.first_name' => 'Vorname',
+                    'dashboard.statistics' => 'Statistik',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -126,17 +112,11 @@ public function testIgnoresEmptyTranslationFieldsInMultipleLocaleTranslations():
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                    ],
-                    'dashboard' => ['statistics' => 'Statistics'],
+                    'login.welcome' => 'Welcome',
+                    'dashboard.statistics' => 'Statistics',
                 ],
                 'de' => [
-                    'login' => [
-                        'form' => [
-                            'first_name' => 'Vorname',
-                        ],
-                    ],
+                    'login.form.first_name' => 'Vorname',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -154,9 +134,7 @@ public function testCanChooseDifferentRowsAsHeader(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                    ],
+                    'login.welcome' => 'Welcome',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -174,9 +152,7 @@ public function testCanChooseDifferentColumnForTranslationKey(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                    ],
+                    'login.welcome' => 'Welcome',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -195,9 +171,7 @@ public function testIgnoresRows(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                    ],
+                    'login.welcome' => 'Welcome',
                 ],
             ],
             $this->generator->parse()->getTranslations()
@@ -224,9 +198,7 @@ public function testParsesFromDifferentSheetByName(): void
         $this->assertSame(
             [
                 'en' => [
-                    'login' => [
-                        'welcome' => 'Welcome',
-                    ],
+                    'login.welcome' => 'Welcome',
                 ],
             ],
             $this->generator->parse()->getTranslations()