Dictionaries available for Search suggestions
By default a US & UK English dictionary is used for spelling suggestions, however alternative dictionaries can be used by setting the Language property in the SearchSuggestions control. You should download and unzip the .dict file(s) of your choice and place it in a folder under the Index Directory called "Dictionaries" (which you can create if need be).
For example - myApp\IndexDirectory\Dictionaries\DICT-DE-DE-German_SE.dict.
The dictionary files must not be renamed, as their language is determined from the filename.
English Dictionaries