Yes, you could change the Standard Objects in Salesforce. It's not simple at the starting, but once you have settled down using the Salesforce platform, you will get it done. Let us begin the process of renaming Standard Objects in Salesforce:
First, go to Setup, then head onto, Customize, after that to Tab Names, and Labels, Click Rename Tabs and Labels. Once you are here, click the object you would want to rename and click edit. That is, it! You have successfully renamed a Salesforce Object.
If you wish to spear ahead your career path in Salesforce, then check out the Salesforce course from Intellipaat. And if you are a beginner, watch the following video on What is Salesforce and get started.