diff --git a/src/PhpSpreadsheet/Reader/Html.php b/src/PhpSpreadsheet/Reader/Html.php
index b57d6c1309..579f3892da 100644
--- a/src/PhpSpreadsheet/Reader/Html.php
+++ b/src/PhpSpreadsheet/Reader/Html.php
@@ -18,6 +18,7 @@
 use PhpOffice\PhpSpreadsheet\Reader\Security\XmlScanner;
 use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
 use PhpOffice\PhpSpreadsheet\Style\Border;
 use PhpOffice\PhpSpreadsheet\Style\Color;
 use PhpOffice\PhpSpreadsheet\Style\Fill;
@@ -1014,6 +1015,17 @@ private function applyInlineStyle(Worksheet &$sheet, int $row, string $column, a
 
                     break;
 
+                case 'direction':
+                    if ($styleValue === 'rtl') {
+                        $cellStyle->getAlignment()
+                            ->setReadOrder(Alignment::READORDER_RTL);
+                    } elseif ($styleValue === 'ltr') {
+                        $cellStyle->getAlignment()
+                            ->setReadOrder(Alignment::READORDER_LTR);
+                    }
+
+                    break;
+
                 case 'font-weight':
                     if ($styleValue === 'bold' || $styleValue >= 500) {
                         $cellStyle->getFont()->setBold(true);
@@ -1083,8 +1095,11 @@ private function applyInlineStyle(Worksheet &$sheet, int $row, string $column, a
                     break;
 
                 case 'text-indent':
+                    $indentDimension = new CssDimension($styleValueString);
+                    $indent = $indentDimension
+                        ->toUnit(CssDimension::UOM_PIXELS);
                     $cellStyle->getAlignment()->setIndent(
-                        (int) str_replace(['px'], '', $styleValueString)
+                        (int) ($indent / Alignment::INDENT_UNITS_TO_PIXELS)
                     );
 
                     break;
diff --git a/src/PhpSpreadsheet/Reader/Xls.php b/src/PhpSpreadsheet/Reader/Xls.php
index 97c481daaa..3d4cb5e5cb 100644
--- a/src/PhpSpreadsheet/Reader/Xls.php
+++ b/src/PhpSpreadsheet/Reader/Xls.php
@@ -1254,6 +1254,8 @@ protected function readXf(): void
 
                         break;
                 }
+                $readOrder = (0xC0 & ord($recordData[8])) >> 6;
+                $objStyle->getAlignment()->setReadOrder($readOrder);
 
                 // offset:  9; size: 1; Flags used for attribute groups
 
diff --git a/src/PhpSpreadsheet/Reader/Xml/Style/Alignment.php b/src/PhpSpreadsheet/Reader/Xml/Style/Alignment.php
index 657decfffe..b4afcdec49 100644
--- a/src/PhpSpreadsheet/Reader/Xml/Style/Alignment.php
+++ b/src/PhpSpreadsheet/Reader/Xml/Style/Alignment.php
@@ -54,6 +54,14 @@ public function parseStyle(SimpleXMLElement $styleAttributes): array
                 case 'Indent':
                     $style['alignment']['indent'] = $styleAttributeValue;
 
+                    break;
+                case 'ReadingOrder':
+                    if ($styleAttributeValue === 'RightToLeft') {
+                        $style['alignment']['readOrder'] = AlignmentStyles::READORDER_RTL;
+                    } elseif ($styleAttributeValue === 'LeftToRight') {
+                        $style['alignment']['readOrder'] = AlignmentStyles::READORDER_LTR;
+                    }
+
                     break;
             }
         }
diff --git a/src/PhpSpreadsheet/Style/Alignment.php b/src/PhpSpreadsheet/Style/Alignment.php
index d5c42c273a..6ff44e3ef6 100644
--- a/src/PhpSpreadsheet/Style/Alignment.php
+++ b/src/PhpSpreadsheet/Style/Alignment.php
@@ -92,6 +92,8 @@ class Alignment extends Supervisor
     const TEXTROTATION_STACK_EXCEL = 255;
     const TEXTROTATION_STACK_PHPSPREADSHEET = -165; // 90 - 255
 
+    public const INDENT_UNITS_TO_PIXELS = 9;
+
     /**
      * Horizontal alignment.
      */
diff --git a/src/PhpSpreadsheet/Writer/Html.php b/src/PhpSpreadsheet/Writer/Html.php
index 27849bf374..ecf79d8060 100644
--- a/src/PhpSpreadsheet/Writer/Html.php
+++ b/src/PhpSpreadsheet/Writer/Html.php
@@ -1115,7 +1115,12 @@ private function createCSSStyleAlignment(Alignment $alignment): array
         if ($textAlign) {
             $css['text-align'] = $textAlign;
             if (in_array($textAlign, ['left', 'right'])) {
-                $css['padding-' . $textAlign] = (string) ((int) $alignment->getIndent() * 9) . 'px';
+                $css['padding-' . $textAlign] = (string) ($alignment->getIndent() * Alignment::INDENT_UNITS_TO_PIXELS) . 'px';
+            }
+        } else {
+            $indent = $alignment->getIndent();
+            if ($indent !== 0) {
+                $css['text-indent'] = (string) ($alignment->getIndent() * Alignment::INDENT_UNITS_TO_PIXELS) . 'px';
             }
         }
         $rotation = $alignment->getTextRotation();
@@ -1126,6 +1131,12 @@ private function createCSSStyleAlignment(Alignment $alignment): array
                 $css['transform'] = "rotate({$rotation}deg)";
             }
         }
+        $direction = $alignment->getReadOrder();
+        if ($direction === Alignment::READORDER_LTR) {
+            $css['direction'] = 'ltr';
+        } elseif ($direction === Alignment::READORDER_RTL) {
+            $css['direction'] = 'rtl';
+        }
 
         return $css;
     }
@@ -1516,7 +1527,6 @@ private function generateRowCellDataValue(Worksheet $worksheet, Cell $cell, stri
     /** @param string|string[] $cssClass */
     private function generateRowCellData(Worksheet $worksheet, null|Cell|string $cell, array|string &$cssClass): string
     {
-        $cellData = ' ';
         if ($cell instanceof Cell) {
             $cellData = '';
             // Don't know what this does, and no test cases.
@@ -1565,13 +1575,21 @@ private function generateRowCellData(Worksheet $worksheet, null|Cell|string $cel
                 }
             }
         } else {
+            $cellData = "$cell";
             // Use default borders for empty cell
             if (is_string($cssClass)) {
                 $cssClass .= ' style0';
             }
         }
+        /*
+         * Browsers may remove an entirely empty row.
+         * An interesting option is to leave an empty cell empty using css.
+         * td:empty::after{content: "\00a0";}
+         * This works well in modern browsers.
+         * Alas, none of our Pdf writers can handle it.
+         */
 
-        return $cellData;
+        return (trim($cellData) === '') ? ' ' : $cellData;
     }
 
     private function generateRowIncludeCharts(Worksheet $worksheet, string $coordinate): string
diff --git a/src/PhpSpreadsheet/Writer/Ods/Cell/Style.php b/src/PhpSpreadsheet/Writer/Ods/Cell/Style.php
index fdb5804984..5c3cf5277d 100644
--- a/src/PhpSpreadsheet/Writer/Ods/Cell/Style.php
+++ b/src/PhpSpreadsheet/Writer/Ods/Cell/Style.php
@@ -151,6 +151,7 @@ private function writeCellProperties(CellStyle $style): void
         $vAlign = $style->getAlignment()->getVertical();
         $wrap = $style->getAlignment()->getWrapText();
         $indent = $style->getAlignment()->getIndent();
+        $readOrder = $style->getAlignment()->getReadOrder();
 
         $this->writer->startElement('style:table-cell-properties');
         if (!empty($vAlign) || $wrap) {
@@ -172,7 +173,7 @@ private function writeCellProperties(CellStyle $style): void
 
         $this->writer->endElement();
 
-        if ($hAlign !== '' || !empty($indent)) {
+        if ($hAlign !== '' || !empty($indent) || $readOrder === Alignment::READORDER_RTL || $readOrder === Alignment::READORDER_LTR) {
             $this->writer
                 ->startElement('style:paragraph-properties');
             if ($hAlign !== '') {
@@ -182,6 +183,11 @@ private function writeCellProperties(CellStyle $style): void
                 $indentString = sprintf('%.4f', $indent * self::INDENT_TO_INCHES) . 'in';
                 $this->writer->writeAttribute('fo:margin-left', $indentString);
             }
+            if ($readOrder === Alignment::READORDER_RTL) {
+                $this->writer->writeAttribute('style:writing-mode', 'rl-tb');
+            } elseif ($readOrder === Alignment::READORDER_LTR) {
+                $this->writer->writeAttribute('style:writing-mode', 'lr-tb');
+            }
             $this->writer->endElement();
         }
     }
diff --git a/src/PhpSpreadsheet/Writer/Xls/Xf.php b/src/PhpSpreadsheet/Writer/Xls/Xf.php
index 2ab5a4ebca..bda33ed364 100644
--- a/src/PhpSpreadsheet/Writer/Xls/Xf.php
+++ b/src/PhpSpreadsheet/Writer/Xls/Xf.php
@@ -220,8 +220,9 @@ public function writeXf(): string
         $header = pack('vv', $record, $length);
 
         //BIFF8 options: identation, shrinkToFit and  text direction
-        $biff8_options = $this->style->getAlignment()->getIndent();
+        $biff8_options = $this->style->getAlignment()->getIndent() & 15;
         $biff8_options |= (int) $this->style->getAlignment()->getShrinkToFit() << 4;
+        $biff8_options |= $this->style->getAlignment()->getReadOrder() << 6;
 
         $data = pack('vvvC', $ifnt, $ifmt, $style, $align);
         $data .= pack('CCC', self::mapTextRotation((int) $this->style->getAlignment()->getTextRotation()), $biff8_options, $used_attrib);
diff --git a/tests/PhpSpreadsheetTests/Reader/Html/HtmlTest.php b/tests/PhpSpreadsheetTests/Reader/Html/HtmlTest.php
index a61f901131..6a8f2a6b93 100644
--- a/tests/PhpSpreadsheetTests/Reader/Html/HtmlTest.php
+++ b/tests/PhpSpreadsheetTests/Reader/Html/HtmlTest.php
@@ -199,7 +199,7 @@ public function testCanApplyAlignment(): void
                         <td valign="center">Center valign</td>
                         <td style="text-align: center;">Center align</td>
                         <td style="vertical-align: center;">Center valign</td>
-                        <td style="text-indent: 10px;">Text indent</td>
+                        <td style="text-indent: 9px;">Text indent</td>
                         <td style="word-wrap: break-word;">Wraptext</td>
                     </tr>
                 </table>';
@@ -220,7 +220,7 @@ public function testCanApplyAlignment(): void
         self::assertEquals(Alignment::VERTICAL_CENTER, $style->getAlignment()->getVertical());
 
         $style = $firstSheet->getCell('E1')->getStyle();
-        self::assertEquals(10, $style->getAlignment()->getIndent());
+        self::assertEquals(1, $style->getAlignment()->getIndent());
 
         $style = $firstSheet->getCell('F1')->getStyle();
         self::assertTrue($style->getAlignment()->getWrapText());
@@ -302,14 +302,14 @@ public function testTextIndentUseRowspan(): void
                   </tr>
                   <tr>
                     <td>2</td>
-                    <td style="text-indent:10px">Text Indent</td>
+                    <td style="text-indent:9px">Text Indent</td>
                   </tr>
                 </table>';
         $filename = HtmlHelper::createHtml($html);
         $spreadsheet = HtmlHelper::loadHtmlIntoSpreadsheet($filename, true);
         $firstSheet = $spreadsheet->getSheet(0);
         $style = $firstSheet->getCell('C2')->getStyle();
-        self::assertEquals(10, $style->getAlignment()->getIndent());
+        self::assertEquals(1, $style->getAlignment()->getIndent());
         $spreadsheet->disconnectWorksheets();
     }
 
diff --git a/tests/PhpSpreadsheetTests/Reader/Xlsx/Issue4248Test.php b/tests/PhpSpreadsheetTests/Reader/Xlsx/Issue4248Test.php
index 01c25edafe..c2b8720adc 100644
--- a/tests/PhpSpreadsheetTests/Reader/Xlsx/Issue4248Test.php
+++ b/tests/PhpSpreadsheetTests/Reader/Xlsx/Issue4248Test.php
@@ -93,7 +93,7 @@ public function testHtml(): void
         $data = str_replace(["\r", "\n"], '', $writer->generateHtmlAll());
         $expected = '          <tr class="row17">' // Cell D18
             . '            <td class="column0 style0">&nbsp;</td>'
-            . '            <td class="column1 style28 null"></td>'
+            . '            <td class="column1 style28 null">&nbsp;</td>'
             . '            <td class="column2 style35 s">Eligible </td>'
             . '            <td class="column3 style70 s">Non</td>';
         self::assertStringContainsString($expected, $data, 'Cell D18 style');
diff --git a/tests/PhpSpreadsheetTests/Reader/Xml/ReadOrderTest.php b/tests/PhpSpreadsheetTests/Reader/Xml/ReadOrderTest.php
new file mode 100644
index 0000000000..0c7618e5fd
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Reader/Xml/ReadOrderTest.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Xml;
+
+use PhpOffice\PhpSpreadsheet\Reader\Xml as XmlReader;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class ReadOrderTest extends AbstractFunctional
+{
+    public function testReadOrder(): void
+    {
+        // Issue 850 - Xls Reader/Writer didn't support Alignment ReadOrder
+        $infile = 'tests/data/Reader/Xml/issue.850.xml';
+        $reader = new XmlReader();
+        $robj = $reader->load($infile);
+
+        $sheet0 = $robj->setActiveSheetIndex(0);
+        self::assertSame(
+            Alignment::READORDER_RTL,
+            $sheet0->getStyle('A1')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            Alignment::READORDER_LTR,
+            $sheet0->getStyle('A2')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            Alignment::READORDER_CONTEXT,
+            $sheet0->getStyle('A3')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            2,
+            $sheet0->getStyle('A5')->getAlignment()->getIndent()
+        );
+        $robj->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Html/HtmlColourScaleTest.php b/tests/PhpSpreadsheetTests/Writer/Html/HtmlColourScaleTest.php
index 87a9fb6983..036fe33fed 100644
--- a/tests/PhpSpreadsheetTests/Writer/Html/HtmlColourScaleTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Html/HtmlColourScaleTest.php
@@ -57,7 +57,7 @@ public function testColourScaleHtmlOutput(): void
             ['G3', 'background-color:#EC926F;">7<', 'cell G3'],
             ['H3', 'background-color:#E67C73;">8<', 'cell H3'],
             ['A4', 'background-color:#57BB8A;">1<', 'cell A4'],
-            ['I4', 'null"><', 'empty cell I4'],
+            ['I4', 'null">&nbsp;<', 'empty cell I4'],
             ['J4', 'background-color:#E67C73;">10<', 'cell J4'],
         ];
         foreach ($expectedMatches as $expected) {
diff --git a/tests/PhpSpreadsheetTests/Writer/Html/HtmlNumberFormatTest.php b/tests/PhpSpreadsheetTests/Writer/Html/HtmlNumberFormatTest.php
index 6044b1d2bb..5ab5b99beb 100644
--- a/tests/PhpSpreadsheetTests/Writer/Html/HtmlNumberFormatTest.php
+++ b/tests/PhpSpreadsheetTests/Writer/Html/HtmlNumberFormatTest.php
@@ -151,6 +151,7 @@ public function testFormatValueWithMask(mixed $expectedResult, mixed $val, strin
 
         $writer = new Html($spreadsheet);
         $html = $writer->generateHTMLAll();
+        $html = str_replace('>&nbsp;<', '><', $html); // clear empty cells
         $dom = new DOMDocument();
         $dom->loadHTML($html);
         $body = $dom->getElementsByTagName('body')->item(0);
diff --git a/tests/PhpSpreadsheetTests/Writer/Html/ReadOrderTest.php b/tests/PhpSpreadsheetTests/Writer/Html/ReadOrderTest.php
new file mode 100644
index 0000000000..9efabbe8f7
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Html/ReadOrderTest.php
@@ -0,0 +1,121 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Html;
+
+use PhpOffice\PhpSpreadsheet\Reader\Html as HtmlReader;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
+use PhpOffice\PhpSpreadsheet\Writer\Html as HtmlWriter;
+use PHPUnit\Framework\TestCase;
+
+class ReadOrderTest extends TestCase
+{
+    public function testInline(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->setCellValue('A1', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A2', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A3', '1-' . 'منصور حسين الناصر');
+        $sheet->getStyle('A1')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_RTL);
+        $sheet->getStyle('A2')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_LTR);
+        $sheet->getStyle('A2')->getFont()->setName('Arial');
+        $sheet->getStyle('A3')->getFont()->setName('Times New Roman');
+        $sheet->setCellValue('A5', 'hello');
+        $sheet->getStyle('A5')->getFont()->setName('Tahoma');
+        $sheet->getStyle('A5')
+            ->getAlignment()->setIndent(2);
+        $writer = new HtmlWriter($spreadsheet);
+        $writer->setUseInlineCss(true);
+        $html = $writer->generateHtmlAll();
+        self::assertStringContainsString(
+            '<td class="gridlines" style="vertical-align:bottom; direction:rtl; color:#000000; font-family:\'Calibri\';',
+            $html
+        );
+        self::assertStringContainsString(
+            '<td class="gridlines" style="vertical-align:bottom; direction:ltr; color:#000000; font-family:\'Arial\';',
+            $html
+        );
+        self::assertStringContainsString(
+            '<td class="gridlines" style="vertical-align:bottom; color:#000000; font-family:\'Times New Roman\';',
+            $html
+        );
+        self::assertStringContainsString(
+            '>&nbsp;</td>',
+            $html
+        );
+        self::assertStringContainsString(
+            '<td class="gridlines" style="vertical-align:bottom; text-indent:18px; color:#000000; font-family:\'Tahoma\';',
+            $html
+        );
+        $spreadsheet->disconnectWorksheets();
+
+        $reader = new HtmlReader();
+        $spreadsheet2 = $reader->loadFromString($html);
+        $sheet0 = $spreadsheet2->getActiveSheet();
+        self::assertSame(
+            Alignment::READORDER_RTL,
+            $sheet0->getStyle('A1')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            Alignment::READORDER_LTR,
+            $sheet0->getStyle('A2')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            Alignment::READORDER_CONTEXT,
+            $sheet0->getStyle('A3')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            2,
+            $sheet0->getStyle('A5')->getAlignment()->getIndent()
+        );
+        $spreadsheet2->disconnectWorksheets();
+    }
+
+    public function testNotInline(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->setCellValue('A1', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A2', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A3', '1-' . 'منصور حسين الناصر');
+        $sheet->getStyle('A1')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_RTL);
+        $sheet->getStyle('A2')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_LTR);
+        $sheet->getStyle('A2')->getFont()->setName('Arial');
+        $sheet->getStyle('A3')->getFont()->setName('Times New Roman');
+        $sheet->setCellValue('A5', 'hello');
+        $sheet->getStyle('A5')->getFont()->setName('Tahoma');
+        $sheet->getStyle('A5')
+            ->getAlignment()->setIndent(2);
+        $writer = new HtmlWriter($spreadsheet);
+        $html = $writer->generateHtmlAll();
+        self::assertStringContainsString(
+            'td.style1, th.style1 { vertical-align:bottom; direction:rtl; border-bottom',
+            $html
+        );
+        self::assertStringContainsString(
+            'td.style2, th.style2 { vertical-align:bottom; direction:ltr; border-bottom',
+            $html
+        );
+        self::assertStringContainsString(
+            'td.style3, th.style3 { vertical-align:bottom; border-bottom',
+            $html
+        );
+        self::assertStringContainsString(
+            '>&nbsp;</td>',
+            $html
+        );
+        self::assertStringContainsString(
+            'td.style4, th.style4 { vertical-align:bottom; text-indent:18px;',
+            $html
+        );
+        $spreadsheet->disconnectWorksheets();
+        // PhpSpreadsheet does not read non-inline styles
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Ods/ReadOrderTest.php b/tests/PhpSpreadsheetTests/Writer/Ods/ReadOrderTest.php
new file mode 100644
index 0000000000..acd06b6add
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Ods/ReadOrderTest.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Ods;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
+use PhpOffice\PhpSpreadsheet\Writer\Ods;
+use PhpOffice\PhpSpreadsheet\Writer\Ods\Content;
+use PHPUnit\Framework\TestCase;
+
+class ReadOrderTest extends TestCase
+{
+    public function testReadOrder(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->setCellValue('A1', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A2', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A3', '1-' . 'منصور حسين الناصر');
+        $sheet->getStyle('A1')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_RTL);
+        $sheet->getStyle('A2')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_LTR);
+        $sheet->getStyle('A2')->getFont()->setName('Arial');
+        $sheet->getStyle('A3')->getFont()->setName('Times New Roman');
+        $content = new Content(new Ods($spreadsheet));
+        $xml = $content->write();
+        self::assertStringContainsString(
+            '<style:table-cell-properties style:vertical-align="bottom" style:rotation-align="none"/>'
+                . '<style:paragraph-properties style:writing-mode="rl-tb"/>'
+                . '<style:text-properties fo:color="#000000" fo:font-family="Calibri"',
+            $xml,
+            'explicit rtl direction in paragraph properties'
+        );
+        self::assertStringContainsString(
+            '<style:table-cell-properties style:vertical-align="bottom" style:rotation-align="none"/>'
+                . '<style:paragraph-properties style:writing-mode="lr-tb"/>'
+                . '<style:text-properties fo:color="#000000" fo:font-family="Arial"',
+            $xml,
+            'explicit ltr direction in paragraph properties'
+        );
+        self::assertStringContainsString(
+            '<style:table-cell-properties style:vertical-align="bottom" style:rotation-align="none"/>'
+                . '<style:text-properties fo:color="#000000" fo:font-family="Times New Roman"',
+            $xml,
+            'no paragraph properties'
+        );
+        $spreadsheet->disconnectWorksheets();
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Writer/Xls/ReadOrderTest.php b/tests/PhpSpreadsheetTests/Writer/Xls/ReadOrderTest.php
new file mode 100644
index 0000000000..a0b1b20d63
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Writer/Xls/ReadOrderTest.php
@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Xls;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class ReadOrderTest extends AbstractFunctional
+{
+    public function testBooleanLiteral(): void
+    {
+        // Issue 850 - Xls Reader/Writer didn't support Alignment ReadOrder
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+        $sheet->setCellValue('A1', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A2', '1-' . 'منصور حسين الناصر');
+        $sheet->setCellValue('A3', '1-' . 'منصور حسين الناصر');
+        $sheet->getStyle('A1')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_RTL);
+        $sheet->getStyle('A2')
+            ->getAlignment()->setReadOrder(Alignment::READORDER_LTR);
+
+        $sheet->setCellValue('A5', 'hello');
+        $spreadsheet->getActiveSheet()->getStyle('A5')
+            ->getAlignment()->setIndent(2);
+
+        $robj = $this->writeAndReload($spreadsheet, 'Xls');
+        $spreadsheet->disconnectWorksheets();
+        $sheet0 = $robj->setActiveSheetIndex(0);
+        self::assertSame(
+            Alignment::READORDER_RTL,
+            $sheet0->getStyle('A1')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            Alignment::READORDER_LTR,
+            $sheet0->getStyle('A2')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            Alignment::READORDER_CONTEXT,
+            $sheet0->getStyle('A3')->getAlignment()->getReadOrder()
+        );
+        self::assertSame(
+            2,
+            $sheet0->getStyle('A5')->getAlignment()->getIndent()
+        );
+        $robj->disconnectWorksheets();
+    }
+}
diff --git a/tests/data/Reader/Xml/issue.850.xml b/tests/data/Reader/Xml/issue.850.xml
new file mode 100644
index 0000000000..314034cb67
--- /dev/null
+++ b/tests/data/Reader/Xml/issue.850.xml
@@ -0,0 +1,85 @@
+<?xml version="1.0"?>
+<?mso-application progid="Excel.Sheet"?>
+<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
+ xmlns:o="urn:schemas-microsoft-com:office:office"
+ xmlns:x="urn:schemas-microsoft-com:office:excel"
+ xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
+ xmlns:html="http://www.w3.org/TR/REC-html40">
+ <DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
+  <Title>Untitled Spreadsheet</Title>
+  <Author>Unknown Creator</Author>
+  <LastAuthor>Owen Leibman</LastAuthor>
+  <Created>2025-09-19T18:05:38Z</Created>
+  <LastSaved>2025-09-19T18:05:38Z</LastSaved>
+  <Version>16.00</Version>
+ </DocumentProperties>
+ <OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">
+  <AllowPNG/>
+ </OfficeDocumentSettings>
+ <ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">
+  <WindowHeight>6510</WindowHeight>
+  <WindowWidth>19200</WindowWidth>
+  <WindowTopX>32767</WindowTopX>
+  <WindowTopY>32767</WindowTopY>
+  <ProtectStructure>False</ProtectStructure>
+  <ProtectWindows>False</ProtectWindows>
+ </ExcelWorkbook>
+ <Styles>
+  <Style ss:ID="Default" ss:Name="Normal">
+   <Alignment ss:Vertical="Bottom"/>
+   <Borders/>
+   <Font ss:FontName="Calibri" ss:Size="11" ss:Color="#000000"/>
+   <Interior/>
+   <NumberFormat/>
+   <Protection/>
+  </Style>
+  <Style ss:ID="s16">
+   <Alignment ss:Vertical="Bottom" ss:ReadingOrder="RightToLeft"/>
+  </Style>
+  <Style ss:ID="s17">
+   <Alignment ss:Vertical="Bottom" ss:ReadingOrder="LeftToRight"/>
+  </Style>
+  <Style ss:ID="s18">
+   <Alignment ss:Vertical="Bottom" ss:Indent="2"/>
+  </Style>
+ </Styles>
+ <Worksheet ss:Name="Worksheet">
+  <Table ss:ExpandedColumnCount="1" ss:ExpandedRowCount="5" x:FullColumns="1"
+   x:FullRows="1" ss:DefaultRowHeight="14.5">
+   <Row>
+    <Cell ss:StyleID="s16"><Data ss:Type="String">1-منصور حسين الناصر</Data></Cell>
+   </Row>
+   <Row>
+    <Cell ss:StyleID="s17"><Data ss:Type="String">1-منصور حسين الناصر</Data></Cell>
+   </Row>
+   <Row>
+    <Cell><Data ss:Type="String">1-منصور حسين الناصر</Data></Cell>
+   </Row>
+   <Row ss:Index="5">
+    <Cell ss:StyleID="s18"><Data ss:Type="String">hello</Data></Cell>
+   </Row>
+  </Table>
+  <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
+   <PageSetup>
+    <Header x:Margin="0.3"/>
+    <Footer x:Margin="0.3"/>
+    <PageMargins x:Bottom="0.75" x:Left="0.7" x:Right="0.7" x:Top="0.75"/>
+   </PageSetup>
+   <Print>
+    <ValidPrinterInfo/>
+    <NoOrientation/>
+    <HorizontalResolution>600</HorizontalResolution>
+    <VerticalResolution>600</VerticalResolution>
+   </Print>
+   <Selected/>
+   <Panes>
+    <Pane>
+     <Number>3</Number>
+     <ActiveRow>4</ActiveRow>
+    </Pane>
+   </Panes>
+   <ProtectObjects>False</ProtectObjects>
+   <ProtectScenarios>False</ProtectScenarios>
+  </WorksheetOptions>
+ </Worksheet>
+</Workbook>