Update

syntax/modules/pagespeed.vim

@@ -0,0 +1,8 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nginx') == -1
+  
+" Accept Language Module <https://www.nginx.com/resources/wiki/modules/accept_language/>
+" Parses the Accept-Language header and gives the most suitable locale from a list of supported locales.
+syn keyword ngxDirectiveThirdParty pagespeed
+
+
+endif