Solved
What scripting language has project chosen?
How can I determine which scripting language is being used for an existing project?
Look at these pages:
https://support.smartbear.com/testcomplete/docs/reference/options/general/project.html
https://support.smartbear.com/testcomplete/docs/scripting/selecting-the-scripting-language.html
https://support.smartbear.com/testcomplete/docs/working-with/managing-projects/dialogs/create.html
