Buster Apache php website in other lang than os

[john doe <johndoe65534@mail.com>]

Hello all,

I'm playing with Apache2 and php.

I'm making a website in an other language than the one Debian Buster is
using.

That is, Buster is in English but the website is written in Duch or any
other language then English.

What do I need to do in Apache and in PHP for it to properly render the
language the website is written in?

Do I need to generate the locales for the desired languages?
Do I need to also do something in Apache?

Any help is appriciated.

--
John Doe