Yes, you can use the kernel from the command line:
https://reference.wolfram.com/language/tutorial/UsingATextBa...
https://reference.wolfram.com/language/tutorial/WolframLangu...
https://reference.wolfram.com/language/tutorial/UsingATextBa...
https://reference.wolfram.com/language/tutorial/WolframLangu...
Update: I guess I owe the Wolfram Language another look.