Yes, there is a way to disable the autoformatting of "true" and "false" text in Excel. Here are the steps:

1. Click on the File tab in the top left corner of the Excel window.
2. Click on Options at the bottom of the left-hand menu.
3. In the Excel Options window, click on Proofing in the left-hand menu.
4. Click on the AutoCorrect Options button in the main window.
5. In the AutoCorrect window, click on the AutoCorrect tab.
6. In the "Replace text as you type" section, scroll down until you find "TRUE" and "FALSE" in the list.
7. Click on each one and then click the Delete button to remove them from the list.
8. Click "OK" to close the AutoCorrect window.
9. Click "OK" to close the Excel Options window.

That's it! Now Excel will no longer autoformat "true" and "false" text when you type them into a cell.