diff --git a/CHANGELOG.md b/CHANGELOG.md
index a758b8fb..575247d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [UNRELEASED]
 
+### Fixed
+
+- Increased the maximum length of the language column to support longer locale codes
+
 ## [1.21.24] - 2025-10-10
 
 ### Fixed
diff --git a/inc/labeltranslation.class.php b/inc/labeltranslation.class.php
index a8b844df..a26c635a 100644
--- a/inc/labeltranslation.class.php
+++ b/inc/labeltranslation.class.php
@@ -61,7 +61,7 @@ public static function installBaseData(Migration $migration, $version)
                   `id`                         INT          {$default_key_sign} NOT NULL auto_increment,
                   `itemtype`                   VARCHAR(30)  NOT NULL,
                   `items_id`                   INT          {$default_key_sign} NOT NULL,
-                  `language`                   VARCHAR(5)   NOT NULL,
+                  `language`                   VARCHAR(10)   NOT NULL,
                   `label`                      VARCHAR(255) DEFAULT NULL,
                   PRIMARY KEY                  (`id`),
                   KEY `itemtype`               (`itemtype`),
@@ -86,6 +86,10 @@ public static function installBaseData(Migration $migration, $version)
             $migration->addKey($table, 'items_id');
         }
 
+        if ($DB->fieldExists($table, 'language')) {
+            $migration->changeField($table, 'language', 'language', "VARCHAR(10) NOT NULL");
+        }
+
         return true;
     }