Hello, Did you take a look at https://wiki.documentfoundation.org/Development/GetInvolved ? Most of LO code (95%?) is C++. About Java, the goal is to try to reduce dependency on Java. For QA tests, we try to migrate Java tests towards Python or even better towards C++. Julien -- Sent from: http://document-foundation-mail-archive.969070.n3.nabble.com/Dev-f1639786.html