default currency depending on language

I did what Nicolas suggested but put it directly in index.php

// Set the currency at the first visit, regarding of the page language

function set_currency($app)
{
  $used_languages = [
    [ "tag" => "en-us", "currency" => 2 ],
    [ "tag" => "ja-JP", "currency" => 3 ],
    [ "tag" => "en-GB", "currency" => 4 ],
    [ "tag" => "en-AU", "currency" => 6 ],
    [ "tag" => "zh-TW", "currency" => 111 ],
    [ "tag" => "ko-KR", "currency" => 145 ] ];

  $lang = JFactory::getLanguage();

  if(!$app->getUserState('com_hikashop.currency_id',0))
    {
      foreach($used_languages as $language)
	{
	  if ($language["tag"] == $lang->get('tag'))
	    {
	      $app->setUserState('com_hikashop.currency_id', $language["currency"]);
	      header('Location: '.$_SERVER['REQUEST_URI']);
	      exit(0);
	    }
	}
    }
}

// Dispatch the application.
$app->dispatch();

set_currency($app);

// Mark afterDispatch in the profiler.
JDEBUG ? $_PROFILER->mark('afterDispatch') : null;

Hello, please where should i put the code ?

When i put both into index.php / template.php i got blank page (i'm using yootheme template)

Oh I forgot, i'm using joomla 3 language translations, not falang.

Please any suggestion ?

Oh i see, i was putting it in the template file - index.php / template.php

Anyway it still doesn't work when i put the code in the root index.php, no currency changes, nothing in log
I changed the language tags and currency id's.

Is there something else what has to be done ? Like currency module visible or ... ?

All the time I thought it will be changing the currency along with language switcher, doesn't it ?
Not just for the first visit, i thought for that is the geolocation plugin.

Please how could i be changing the currency together with joomla language switcher module ?

Hi,

You can create a little system plugin which will be called at each page load to change the currency depending on the language.
The code in a previous post can be used and adapted for your needs.
It require php knowledge.

Well i guess it would be better to integrate the changes into language switcher to be able to alternate the currency via currency switcher then as well.

Its also because we are using Joomla articles to display products, where the currency module doesn't affect displayed price.
And currency switcher is displayed just on the checkout page.

Anyway thank you very much.

integrate the changes into language switcher

I came across this requirement for my Swiss website where I needed to change the currency depending on de-DE (German German) or de-CH (German Swiss). If German prices to be shown in Euros, if Swiss prices to be shown in Swiss Francs (CHF).

Fortunately, I found this thread! Anyway, I've created a small plug-in called: CurrencyFollowsLanguage which simply maps a system language tag to a hikashop currency ID. You can set up these maps (up to 10, easily extended), in the plugin backend.

Zip file of the plug-in attached.