[schlenk]

Well, you might not notice Tcl if you see it sometimes.

For example have a look at the build scripts in MacPorts, those are valid Tcl programs (if you load the needed procs first). https://guide.macports.org/chunked/development.examples.html

As Tcl is very often used for DSL style usecases, you might mistaken Tcl code for more or less pseudo code, config files or something like that.