Hello,

Thank you for posting in our forums!

Those error strings are stored in resx files.  You can override the resource strings using the Infragistics.Documents.TextDocument.RegisterResources() method.

The particular string you are pointing out in the screenshot is using the key: Diagnostic_Error_UnexpectedToken

Below are other some other strings you may want to change:

<data name="Diagnostic_Error_Expected" xml:space="preserve">
  <value>{0} expected</value>
</data>
<data name="Diagnostic_Error_ErrorNonTerminal" xml:space="preserve">
  <value>{0} is not correct</value>
</data>
<data name="Diagnostic_Error_UnexpectedToken" xml:space="preserve">
  <value>Unexpected token '{0}'</value>
</data>
<data name="Diagnostic_Error_UnrecognizedContent" xml:space="preserve">
  <value>Unrecognized content: '{0}'</value>
</data>

If you have any further questions or concerns with this, please let me know and I will be glad to help.