|I've been doing some intensive research over at the [url=http://inventory.goto.com/d/searchinventory/suggestion/]Goto Search Suggestion Tool[/url] and notice a couple of things.|
1. As we know, they have combined plurals for most words into the singular form of that word. For example, searching on "Glossaries" gives you results for "Glossary".
However with languages other than English this seems not to be the case. I guess the Plurals Checker is only set up for English. So if you are checking non-english terms, make sure to check the plural form.
It also makes sense to check plurals in English as well just in case, there are still a few they havn't caught yet.
2. The Suggestion Tool doesn't handle extended letters at all, convert them to normal letters. For example, "glossário" (Portuguese) doesn't yield a response whereas "glossario" does.
Hope this helps,