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It's best for SEO purposes that we use the main page keywords in our urls For example stackoverflow uses this technique too.

I wonder if it's okay to use something like:طلا-نفره
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migrated from Apr 1 '11 at 7:02

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3 Answers 3

No, it is not. Officially you have to URL-encode them.

I am not sure how far the implementation of IRI is, It may work in reality, but I have ran into all kind of trouble with Russian characters in URL's and query strings so I got rid of them.

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Short answer: not if you want to follow the rules.

RFC 1738 describes the required encoding and the rationale in section 2.2:

Thus, only alphanumerics, the special characters "$-_.+!*'(),", and reserved characters used for their reserved purposes may be used unencoded within a URL.

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The current specification is RFC 3986. – Gumbo Apr 1 '11 at 7:01
Expect this to change, though; ICANN's working hard on Internationalized Domain Names, which by their nature would require an update to the rules for URIs. – T.J. Crowder Apr 1 '11 at 7:03

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