Marketing Form API returns error when form is configured as English (British)

[Skullsneeze]

In codegen/Marketing/Forms/Model/HubSpotFormConfiguration.php:345 a list of allowed languages is provided through getLanguageAllowableValues(). This list does include en but when a form is configured to use "English (British)" in Hubspot the value returned for this is en-gb.

When requesting this form using the marketing API (eg. $client->marketing()->forms()->formsApi()->getById($formId)) an exception is thrown, saying the language is invalid.

Solution: Add the en-gb language to the list.

Temporary patch if anyone needs to fix this locally:

--- codegen/Marketing/Forms/Model/HubSpotFormConfiguration.php    2026-04-16 11:41:32
+++ codegen/Marketing/Forms/Model/HubSpotFormConfiguration.php    2026-04-16 11:41:47
@@ -387,6 +387,7 @@
             self::LANGUAGE_ZH_CN,
             self::LANGUAGE_ZH_HK,
             self::LANGUAGE_ZH_TW,
+            'en-gb', // TMP FIX
         ];
     }
 

[ksvirkou-hubspot]

Thank you for bringing this up.
Fixed in 14.0.6.