I want to change the wording on a scanned document can I do this with Libre
How about copyright?
If you already made Optical Character Recognition (OCR) of your scan and save it into any text format, then you can change your document in LibreOffice
You can scan the document and extract text from the document. All you need is Performing OCR text recognition on the document and then paste it on your Libreoffice. The software will help you to scan the highlighted text and convert them into words or text for you to copy.
If your document is in PDF format, some people may use PDF editor software to edit it in PDF format or some might even convert the document to other formats like LibreOffice, word, etc. I hope you can manage it using the steps recommended above.
If you still not sure how to do it you can just refer to here on how to copy text from PDF document with the best OCR software you can find.