Alternative page with proper canonical tag Error for GSC

Hello guys,

How to optimize Alternative page with proper canonical tag for my website?

I have my website most language and currency.

So for example page:

examplesite.com/product/furniture-a/currency=try
examplesite.com/product/furniture-a/?currency=usd
examplesite.com/product/furniture-a/?currency=eur

This pages are error my Google Search console

I think examplesite.com/product/furniture/?currency=try that page for I should add canonical.

<a href="examplesite.com/product/furniture/?currency=try"</a>
<link rel="canonical" href="examplesite.com/product/furniture-a">

Do you think? How to I optimize that problem?

If your website is in PHP, use a function for automatic setting of the canonical link from the database. This will not work on non+hosted sites like Shopify, Wix and Weebly.

tylero said:

If your website is in PHP, use a function for automatic setting of the canonical link from the database. This will not work on non+hosted sites like Shopify, Wix and Weebly.

Click to expand...

My website is not PHP

@Niggax Update your robots.txt file to include disallow directives that prevents search engine bots from ever crawling URLs with a special parameter in the permalink.

In the example you provided above, it will be something like this:

Disallow: /product/furniture-a/currency=*
Disallow: /product/furniture-a/?currency=*

Or, if this is something that occurs with other products, you can try this as well:

Disallow: /product/*/currency=*
Disallow: /product/*/?currency=*

That should take care of the problem because, at the end of the day, search engine bots should NOT be crawling those URLs in the first place as they don´t provide any SEO value and it´s just a copy of the original URL that has been dynamically created by user interaction (most likely) when using some sort of on-page filter.

I hope this helps.