diff --git a/src/Doctrine/Functions/SiValueSort.php b/src/Doctrine/Functions/SiValueSort.php
index 3d0a7cc8..1bba1b9f 100644
--- a/src/Doctrine/Functions/SiValueSort.php
+++ b/src/Doctrine/Functions/SiValueSort.php
@@ -82,7 +82,10 @@ class SiValueSort extends FunctionNode
         assert($this->field !== null, 'Field is not set');
 
         $platform = $sqlWalker->getConnection()->getDatabasePlatform();
-        $fieldSql = $this->field->dispatch($sqlWalker);
+        $rawField = $this->field->dispatch($sqlWalker);
+
+        // Normalize comma decimal separator to dot for SQL platforms (European locale support)
+        $fieldSql = "REPLACE({$rawField}, ',', '.')";
 
         if ($platform instanceof PostgreSQLPlatform) {
             return $this->getPostgreSQLSql($fieldSql);
@@ -92,6 +95,9 @@ class SiValueSort extends FunctionNode
             return $this->getMySQLSql($fieldSql);
         }
 
+        // SQLite: comma normalization is handled in the PHP callback
+        $fieldSql = $rawField;
+
         if ($platform instanceof SQLitePlatform) {
             return "SI_VALUE({$fieldSql})";
         }
@@ -168,6 +174,9 @@ class SiValueSort extends FunctionNode
             return null;
         }
 
+        // Normalize comma decimal separator to dot (European locale support)
+        $value = str_replace(',', '.', $value);
+
         // Match a number at the very start (allowing leading whitespace), optionally followed by an SI prefix
         if (!preg_match('/^\s*(\d+\.?\d*)\s*([pnuµmkKMGT])?/u', $value, $matches)) {
             return null;
diff --git a/tests/Doctrine/Functions/SiValueSortTest.php b/tests/Doctrine/Functions/SiValueSortTest.php
index 4c13ff69..dbdd9d28 100644
--- a/tests/Doctrine/Functions/SiValueSortTest.php
+++ b/tests/Doctrine/Functions/SiValueSortTest.php
@@ -37,7 +37,7 @@ final class SiValueSortTest extends AbstractDoctrineFunctionTestCase
         $sql = $function->getSql($this->createSqlWalker(new PostgreSQLPlatform()));
 
         $this->assertStringContainsString('CASE', $sql);
-        $this->assertStringContainsString('substring(part_name', $sql);
+        $this->assertStringContainsString("REPLACE(part_name, ',', '.')", $sql);
         $this->assertStringContainsString('1e-12', $sql);
         $this->assertStringContainsString('1e-9', $sql);
         $this->assertStringContainsString('1e-6', $sql);
@@ -56,7 +56,7 @@ final class SiValueSortTest extends AbstractDoctrineFunctionTestCase
         $sql = $function->getSql($this->createSqlWalker(new MySQLPlatform()));
 
         $this->assertStringContainsString('CASE', $sql);
-        $this->assertStringContainsString('REGEXP_SUBSTR(part_name', $sql);
+        $this->assertStringContainsString("REPLACE(part_name, ',', '.')", $sql);
         $this->assertStringContainsString('1e-12', $sql);
         $this->assertStringContainsString('1e6', $sql);
     }
@@ -106,11 +106,16 @@ final class SiValueSortTest extends AbstractDoctrineFunctionTestCase
         yield 'plain_integer' => ['100', 100.0];
         yield 'plain_decimal' => ['4.7', 4.7];
 
-        // Decimal values with prefix
+        // Decimal values with prefix (dot separator)
         yield 'decimal_nano' => ['4.7nF', 4.7e-9];
         yield 'decimal_micro' => ['0.1uF', 0.1e-6];
         yield 'decimal_kilo' => ['2.2k', 2.2e3];
 
+        // Comma decimal separator (European locale)
+        yield 'comma_kilo' => ['4,7k', 4.7e3];
+        yield 'comma_micro' => ['2,2uF', 2.2e-6];
+        yield 'comma_kilo_space' => ['1,2 kΩ', 1.2e3];
+
         // Number NOT at the start — should return NULL
         yield 'prefixed_name' => ['CAP-100nF', null];
         yield 'name_with_number' => ['R 4.7k 1%', null];