Google uses a config language called Borg Config Language (BCL). It is an extension of GCL (https://research.tue.nl/en/studentTheses/gcl-viewer https://researc

Google uses a config language called Borg Config Language (BCL). It is an extension of GCL (https://research.tue.nl/en/studentTheses/gcl-viewer https://research.tue.nl/en/studentTheses/gcl-viewer ). GCL was built with ideas from natural language programming. It is extremely difficult to learn and use. Errors are very easy to make and hard to detect. Maintainability is poor. Some lessons are still unlearned after 40 years.