You've already known you can type the field's titles, column headers,etc in your language. So the only thing that you have to do to make it work completely in your language is to change the language of built-in messages. Message file is an xml file which locates under the EasyDotNet\version(for instance, EasyDotNet\3_0) of the web application root folder or the location you specified. Open this file by any text editor, such as notepad, and change the content between <Message>...</Message> elements. The following is an instance of one message.
<EasyMessage>
<Key>DATAFORM_ID_NOT_SPECIFIED</Key>
<Message>DataFormID property has not been specified.</Message>
<Memo />
<CategoryID>1</CategoryID>
</EasyMessage>
And even if you'd like to use english messages, however, you don't like the default messages, go ahead to change them.
We'd really appreciate it if anyone could provide us addtional language of message file. Please send it to us and we will put your name in the xml file.