The behavior should be the same.
At least that is the intention.
But the way the application is working is different.
Lets say there is a book explaining something (database)
It depends on your language how you read the book.
I can be wrong with the following, but it is just me trying to explain it in a simple way
Western people read from left to right.
Arabs read from right to left.
Japanese read from top to bottom
The book (database) is telling the same in all languages.
But the language (os/application) defines on how to read it.
I hope this makes sense.
Same is with websites.
A website is a website.
A browser is a browser.
But not every browser shows the website in the exact same way as other browsers do.