Where would you place a Change language button/Country selector (or dropdown) on a web page? In a footer menu or in a utility menu in the top right corner of a web page or somewhere else on the page? What are your findings? Where does it feel most natural?
I won't go for the note in the footer since the primary use of such a selector is when landing the very first time on the website, as soon as the user sees that he does not understand the site language, he must not have to scroll to the footer to switch language.
But this should be a secondary action. So given the cultural context, I'll put it on the top right corner for left-to-right layout.
This case study shows that users mostly expect that the language button is in the top right:
I think it is good standard to have language selector at top right corner which allows the user to quickly change the selection besides having at the bottom. Refer the McAfee home.mcafee.com website, like how they have combined the actual language name/characters with country.
Also, Refer this thread which has detailed study on the placement of country selector. I think this thread will answer what you are after...