Well if you know how a compiler works, where you take a document as input, parse it and it outputs as an o file or exe? In the case of TML you will be able to input a document defining the programming language, so this means Tau will be like an Internet of Languages. To explain in depth will require Ohad but the breakthrough of TML is that unlike what you have with Ethereum or Tezos where you have to basically work within the box, in Tau you define the box using TML.