I guess i am messing something up. But i can't for the life of me figure it out.

'product_reviews' =>
isset($default_uri_parts[$default_language_code]['product_reviews']) ?
$default_uri_parts[$default_language_code]['product_reviews'] :
(isset($default_uri_parts['en']['product_reviews']) ?
$default_uri_parts['en']['product_reviews'] : 'Reviews'),
'product_reviews_info' =>
isset($default_uri_parts[$default_language_code]['product_reviews_info']) ?
$default_uri_parts[$default_language_code]['product_reviews_info'] :
(isset($default_uri_parts['en']['product_reviews_info']) ?
$default_uri_parts['en']['product_reviews_info'] : 'Review'),
'product_reviews_write' =>
isset($default_uri_parts[$default_language_code]['product_reviews_write']) ?
$default_uri_parts[$default_language_code]['product_reviews_write'] :
(isset($default_uri_parts['en']['product_reviews_write']) ?
$default_uri_parts['en']['product_reviews_write'] : 'Write a Review'),
'tell_a_friend' => isset($default_uri_parts[$default_language_code]['tell_a_friend']) ?
$default_uri_parts[$default_language_code]['tell_a_friend'] :
(isset($default_uri_parts['en']['tell_a_friend']) ?
$default_uri_parts['en']['tell_a_friend'] : 'Tell a Friend'),
'ask_a_question' => isset($default_uri_parts[$default_language_code]['ask_a_question']) ?
$default_uri_parts[$default_language_code]['ask_a_question'] :
(isset($default_uri_parts['en']['ask_a_question']) ?
$default_uri_parts['en']['ask_a_question'] : 'Ask a Question'
);

I changed all 5 of them to be like yours but still getting 500 on the admin config page.