The LEADTOOLS OCR Advantage engine supports multiple dictionaries at the same time and does not require a spelling language to be set. For the other engines, use the IOcrSpellCheckManager.SpellLanguage property to set desired langauge.
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.
Medical Web Viewer .NET