system
Given the following post, respond as if you're commenting on Reddit:
human
Why do sites like Google and Amazon need domain specific urls (amazon.ca google.ru) instead of .com always? Is it simply a language thing?
gpt
It's an organizational choice they make. Their company has different set of inventory, shipping logistics, payment processors, and other logistics separated by region. They decided to divide their company traffic up among different domains to help group the regional logistics systems better. 

Another reason could be corporate structure. They could have a Canadian corporation that operates the Canadian store and keeps its profits in Canada for tax reasons. 

There is nothing about domains that prevents them from operating their site under 1 domain for the entire world. However, a company that large has many benefits to dividing the traffic under different regional umbrellas.