Force language for Firefox spellchecker

Forces language (used by Firefox spellchecker) in textareas and input text fields

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        Force language for Firefox spellchecker
// @description Forces language (used by Firefox spellchecker) in textareas and input text fields
// @namespace   Firefox scripts
// @include     *
// @version     1.0
// @grant       none
// ==/UserScript==

var forcedLang = 'pl';

var i;
var tas = document.getElementsByTagName('textarea');
for(i=0; i<tas.length; ++i)
{
  tas[i].setAttribute('lang', forcedLang);
}
var ins = document.getElementsByTagName('input');
for(i=0; i<ins.length; ++i)
{
  if(ins[i].type.toLowerCase() == 'text')
    ins[i].setAttribute('lang', forcedLang);
}