Hello Priya Ramesh,
It is not possible to dump the website as aspx pages, because there are not physical files. All data is stored into database. If it is only a matter of translation you could create a separate second -staging project using datasbase backup of the master website. Your translators will work on the staging project and when they are done you could use database replication tool to merge the changes.
The better and cost effective option is providing them access to the cms and allow to do the translation.
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