Meanwhile, the Language team did monitor the conversation and based on that expected the patches to be reverted to unblock the train.

T199941 (Fatal MWException in Babel: "Language::isValidBuiltInCode must be passed a string") is the only remaining blocker for the train. I see some activity at the task (commit merges, deployments) but the task is still open, UBN and a subtask of T191059 (1.32.0-wmf.13 deployment blockers), making it a blocker.

If the issue is resolved, please resolve the phabricator task. If there is still some cleanup to do, but it's not blocking the train, please remove the task from T191059 blockers.

Thanks,

Željko