4d51ede8_rks_Search_UI_2_9___Lucidworks__Description
[Parameter] Index for Spell Checking [Fields API Attribute Name] index_for_spellcheck [Description] 
This allows terms from this field to be used in creation of a spelling check index that will be created by default at the time of indexing. All fields selected for use in spell checking are combined into a single "spell" field for use in search suggestions.
Field Configuration - LucidWorks Search UI 2.9 - Lucidworks
Description