Let's thank Allan Douglas R. de Oliveira, Daniel Reis and Danilo Chilene who contributed the Portuguese translation of the ESB and SOA introduction:

https://zato.io/docs/intro/esb-soa-pt.html

If you'd like to know more what an Enterprise Service Bus and Service Oriented Architecture as understood by the Zato project should look like, this is the great place to start.

Note that the article is available in English and ру́сский as well.