Hello Wayne24,
Welcome to the HP Forums! I hope you enjoy your experience!
I understand you accidentally selected a wrong language on your ChromeBook. Everyone can be clumsy sometimes, it happens. However, I do have the information to assist you! This HP document contains all the instructions you need on changing languages on your HP ChromeBook: HP Chromebook PCs - Changing Languages on Your HP Chromebook (Chrome OS)
Please try these and instructions and let me know if you found the document helpful. Thanks for bringing this issue to the HP Forums. Have a great day!
Mario