Spell Checking with Automatic Spell Language Selection

In the special (default) case, when the specified spelling language is set to AUTO, the language checking will be performed based on the recognition language selection (LanguageEnabled Property) as follows:

If the recognition language selection is empty, there won't be language checking
If one recognition language has been set, that language will be automatically selected for language checking, assuming that the appropriate Language dictionary is available
If two or more languages are selected for recognition, language checking will be done for all selected languages for which a Language dictionary is available