You may edit your templates as you choose. Just make sure you make backups to reupload incase you mess up one like you did above.
Reviewpost is not Links software so honestly there is nothing easy I can tell you here other than to make sure to back things up and go through the language file and reword things as you like. Afterwards you would need to go script by script through the templates and edit them as you desire.
Modifications forums are located at the bottom of our site for customers to assist each other with issues that fall outside product support such as hacking the code.