in july 1998, the directory became multilingual with the addition of the "world" top-level category. the remainder of the directory lists only english language sites. by may 2005, seventy-five languages were represented. the growth rate of the non-english components of the directory has been greater than the english component since 2002. while the english component of the directory held almost 75% of the sites in 2003, the "world" level grew to over 1.5 million sites as of may 2005, forming roughly one-third of the directory. the ontology in non-english categories generally mirrors that of the english directory, although exceptions which reflect language differences are quite common.