Code Injection with Language Information?

Hi: I’m reading https://cmake.org/cmake/help/latest/command/project.html#code-injection But it seems to me that there isn’t a hook for:

- Toolchain is read and compilers setup
- Languages has been enabled
- No targets has been created yet 

My CMake now goes:
toolchain.cmake:

set(CMAKE_PROJECT_TOP_LEVEL_INCLUDES  project_fixup.cmake)

project_fixup.cmake:

get_property(LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
message(STATUS "Enabled Languages: ${LANGUAGES}")

but during configuration time it prints:

...
-- Enabled Languages: 
...

which is empty.

What am I doing wrong here?