seo - Two identical URL's but different order in parameters: Duplicated content? -

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my own cms automatically adds new parameters links in page specify given language.

it works quite doesn't put var in same position, giving me link same page/language:

www.xxx.yy/index.php?mod=blog&page=3&lang=en

or

www.xxx.yy/index.php?mod=blog&lang=en&page=3

will search engines smart enough detect both urls same? or detect 2 different urls , therefore mark them duplicated content?

i fix issue anyway, i'm curious since long time ago.

google supports this, explicitly mention example in webmaster blog:

like www.example.com/skates.asp?color=black&brand=riedell , www.example.com/skates.asp?brand=riedell&color=black. having type of duplicate content on site can potentially affect site's performance, doesn't cause penalties. our article on duplicate content:

duplicate content on site not grounds action on site unless appears intent of duplicate content deceptive , manipulate search engine results. if site suffers duplicate content issues, , don't follow advice listed above, job of choosing version of content show in our search results.

for other duplicate content worries, consider specifying canonical url.


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