Which URL is SEO friendly when it comes to non ASCII characters?

Question

1. /λαδοκολλα-περι-ανεμων
2. /ladokolla-peri-anemon

In the first URL I'm using the same business name, while in the second one I have converted the business name to Latin characters.

We know that the non ASCII characters harm the URL because in older browsers may not be able to follow links or load images, and It may make URLs ugly and hard to read since browsers may percent encode some of these characters before displaying them in the location bar.

But reading the answer here confusing me! Why is ID in the URL a bad idea?(When a search term is located in the actual URL, it is weighted much more heavily than the content of the page, etc.).

Now, which one is more SEO friendly?

Answer 1

never mind:) do it on the way, your users like better. Google is able to understand both of Latin and Unicode urls. In countries like Russia there are since many years three url types - latin, cyrillic (unicode) and transliterated. And Google understands and ranks all of them.

Do some measurements and research on your users: from where they are coming, is there much direct traffic, are they mostly living in greece or abroad? So you get understanding about how they input your page urls to navigate them, whether they have only usa/uk keyboard layout or the greece layout too, and so on. After you understand it you will adjust your urls so, if they are most comfortable for your users.

Answer 2

I'd probably use your keywords report from Search Console. In case visitors are searching in Greek and there is a high chance to have those keywords in your URL then I'd go with λαδοκολλα-περι-ανεμων

Otherwise I'd use converted.

But all in all it might be not a big deal anyway. E.g. in Russian market both search engines are pretty good in converting letters both ways and the only researches I came across were about "how the user search your website? Do they switch keyboard layout?" and so on.