problem with "Chanel® Mini " as name of product

Hi,

Having that character in the alias is not necessary a problem.
It's only a problem for the SEF system of Joomla if you have the "Unicode Aliases" setting deactivated in the Joomla configuration and if you remove the ids of the products and categories in the URLs (setting from the HikaShop configuration).
With the ids in the URLs, the alias can be anything, since the SEF system will rely on the ids to identify the products/categories.

So unfortunately, we should not filter these characters. Otherwise, people wouldn't be able to use them when they want to use them. It's just a combination of settings wrongly configured on your website which lead to that error.

Hi,

The problem that will appear is that people that want to use these characters won't be able to.
While it might not be good to do so in Russian, I've seen many websites in Chinese doing so. While I'm not familiar with SEO best practices for Chinese, even wikipedia does it so I suppose that they must have some good reasons for it.

And as I said, this happens only because of the way you configured your website.
If you deactivate the unicode aliases setting of the Joomla configuration, then HikaShop will use the language transliteration system of Joomla to generate the aliases and it should normally convert the Russian letters to latin.
It's do with this code:

function addAlias(&$element){
		if(empty($element->product_alias)){
			$element->alias = strip_tags(preg_replace('#<span class="hikashop_product_variant_subname">.*</span>#isU','',$element->product_name));
		}else{
			$element->alias = $element->product_alias;
		}
		$config = JFactory::getConfig();
		if(!$config->get('unicodeslugs')){
			$lang = JFactory::getLanguage();
			$element->alias = str_replace(',','-',$lang->transliterate($element->alias));
		}
		$app = JFactory::getApplication();
		if(method_exists($app,'stringURLSafe')){
			$element->alias = $app->stringURLSafe($element->alias);
		}elseif(method_exists('JFilterOutput','stringURLUnicodeSlug')){
			$element->alias = JFilterOutput::stringURLUnicodeSlug($element->alias);
		}else{
			$element->alias = JFilterOutput::stringURLSafe($element->alias);
		}
	}