Detecting default browser language preference of user

[idontknowjs]

Actual Behaviour
For more reliable and accurate i18n support for the website, we can detect the browser language preference using JavaScript's navigator.language function which returns the default language preference of browser.

Expected Behaviour
Depending upon the prefered language, website would open in that language.

Steps to reproduce it

Change the default language of browser to any native language. In this case, I changed to Spanish, like I did below
While visiting the website, it should open in https://p5js.org/es/
But it opens in https://p5js.org/

Would you like to work on the issue?
Yes