Как переписать правила для NGINX?

# The Friendly URLs part
# redirect all requests to /ru/favicon.ico
# to /favicon.ico
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(sr|ru)favicon.ico$ favicon.ico [L,QSA]

# redirect all requests to /en/assets* and /ru/assets* to /assets*
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(sr|ru)/assets(.*)$ assets$2 [L,QSA]

# redirect all other requests to  /ru/*
# to index.php and set the cultureKey parameter
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(sr|ru)?/?(.*)$ index.php?cultureKey=$1&q=$2 [L,QSA]