I want to redirect URL:
prolist.php?id=1297&lang=en
to that:
details.php?id=1297
But id don't want to redirect other URL's that haven't "lang=en" parameter at the end of URL.
So you want to implement a condition for your redirection ruile that matches a precise pattern against the query string:
RewriteEngine on
RewriteCond %{QUERY_STRING} ^id=(\d+)&lang=en$
RewriteRule ^/?prolist\.php$ /details.php?id=%1 [QSD,R=301]
And maybe you also want to implement an internal rewrite rule:
RewriteEngine on
RewriteCond %{QUERY_STRING} ^id=(\d+)&lang=en$
RewriteRule ^/?prolist\.php$ /details.php?id=%1 [QSD,L,R=301]
RewriteCond %{QUERY_STRING} ^id=(\d+)$
RewriteRule ^/?details\.php$ /prolist.php?id=%1&lang=en [L]