check your grammar !

if you can understand this sentence , then you understand English and I'm sure you know how to use it . The question is : How well ?

And if you want , check your grammar in this site :
http://www.spellchecker.net/spellcheck/

And I'm sure , you know " Translate Google " . Translate Google is a translastor that you can change some language in there . like Indonesia - English , Indonesia - Japan , ect . But I found some translator . Here you are :
1. http://www.citcat.com/ ( there are translator and dictionary )
2. http://translate.reference.com/

Thanks you :)