Change the text and link of the header button when switching languages

Hello,
I have this website in three languages (created manually): Spanish, French, and English.

https://alpha-bay.com

But I can't figure out how to change the "contact us" button in the header to its version in each language.
Does anyone know how to resolve this through code?
Thank you very much.

You want to rename button text or?

If rename button text, follow these

(remember to save a copy of all code somewhere, just for backup)

First, find this code in your language code and change it to

to this code

  /* HOMEPAGE-LOGO LINKS TO PROPER LANGUAGE HOMEPAGE */
  if (lang == "es") {
    $('a[href="/"]').attr("href", "/es/inicio/");
  $("a.btn").html(function() { 
          return $(this).html().replace("Contact us", "ES Contact US");  
    });
  }
 if (lang == "fr") {
   $("a.btn").html(function() { 
          return $(this).html().replace("Contact us", "FR Contact US");  
    });
  }

Hi @tuanphan

That worked perfectly, thank you very much!
And could I ask you how to change the link as well?
In the case of English, it's already correct, but for French and Spanish, I want to direct to their respective pages:

FR:
https://alpha-bay.com/fr/contactez-nous

ES:
https://alpha-bay.com/es/contacta

Thank you so much for your help!

@tuanphan  Thank you! You've been incredibly helpful! Everything is sorted.