There is no single "free format" language, as the term is generally used to describe any programming language that doesn't have strict syntactic rules governing the placement of code elements within a file. This flexibility can be a good thing, as it allows developers to organize their code in a way that makes sense to them, and can make code more readable and maintainable. However, it can also lead to problems if code is not consistently formatted, or if different developers working on the same code base use different formatting conventions.
Some languages, such as Python and Ruby, have specific style guides that outline recommended formatting conventions, and many developers adhere to these guidelines to ensure that their code is consistent with others in the community. Other languages, such as C and C++, have more rigid rules governing how code should be formatted, and most developers stick to these rules to avoid getting into arguments over style.