Which languages are useful for whole website designing?

Answer 1

Useful languages are HTML, CSS, JS, PHP, and SQL as the main ones. Considering the nature of the question, I assume you're very new at this, so I'll briefly explain each of their uses.
HTML is used to describe the content of the web-page.
CSS is used to control the appearance of the web-page.
JS is a client side scripting language.
PHP is a server side scripting language.
SQL is a language devised to interact with databases.

Answer 2

HTML5

Answer 3

Thanks bro