You can Find Many Article regarding this topic on Internet. Like Visit these.

https://codex.wordpress.org/Multilingual_WordPress

http://www.wpbeginner.com/beginners-guide/how-to-easily-create-a-multilingual-wordpress-site/

Our recommended is WMPL Plugin or Polylang. Or Use this Method.

If you have Good Hosting then you can use this method, If you will use this method then there will be no problem in future. 

Like You want to create website for "English, Arabic, Greek

Then Create Folder like this.

www.domain.com - Its For English

www.domain.com/ar - This will be for Arabic.

www.domain.com/gr - It will be for Greek.

Install WordPress on these 3 folders , And Link these URL in Menu, So in this Way Every language will have different folder and different Database . 

You can also use same method for Country etc. 

I hope this will help you. Thanks