Ok, I'm going to explain it to you clearly !

So first of all you're on the homepage:



Then you get this:



After this page appears:



Then, this list appears, and choose the language you want, for exemple: english:



Once you've selected it:




Well, that's done ! You can go back to the homepage by clicking on my picture (top left) and normally it will be in english !

Just to let you know you should be able to make a thingy somewhere so the browser can choose the language immediately. The registrations should be in the language they choosed as well than.

Awesome! This helped a lot. I'm still trying to learn French so I could post in the French section. Those 3 years of French class were useful.