Add Greek language

I have see that snowball support greek
https://snowballstem.org/algorithms/greek/stemmer.html

But I cannot use it? Is something that I have to do at configuration?

snowballstem.org is

The Snowball compiler translates a Snowball program into source code in another language - currently Ada, ISO C, C#, Go, Java, Javascript, Object Pascal, Python and Rust are supported.

So not PHP, and not the PHP stemmer this module uses https://github.com/wamania/php-stemmer

There are two options I can see.

• Convert the snowballstem algorithm into PHP and submit it to the PHP module.
• Or if people are going to use it: you can use the snowballstem library (which if I see the explanation it needs compiling and placing the .so file in you path) via PHP with https://github.com/amaccis/php-stemmer It would be possible to update this module to alternatively use that in addition