The OCR engine supports spell checking through language dictionaries. You set the spell language to use with the IOcrSpellCheckManager.SpellLanguage property prior to calling IOcrPage.Recognize.
Each OCR engine supports different language dictionaries, to get a list of the dictionaries supported by a specific engine, use IOcrSpellCheckManager.GetSupportedSpellLanguages.
For more information on the spell checking system, refer to IOcrSpellCheckManager.
Reference
IntroductionGetting Started (Guide to Example Programs)
LEADTOOLS OCR .NET Assemblies
Programming with LEADTOOLS .NET OCR
An Overview of OCR Recognition Modules
Creating an OCR Engine Instance
Starting and Shutting Down the OCR Engine
Working with OCR Languages
Working With OCR User Dictionaries
Working with OCR Pages
Working with OCR Zones
Recognizing OCR Pages
OCR Confidence Reporting
Using OMR in LEADTOOLS .NET OCR
OCR Languages and Spell Checking
OCR Engine-Specific Settings
OCR Tutorial - Working with Pages
OCR Tutorial - Recognizing Pages
OCR Tutorial - Adding and Painting Zones
OCR Tutorial - Working with Recognition Results
OCR Tutorial - Scanning to Searchable PDF