15. A system for forming a target error model to facilitate spell checking input text related to a target data collection comprising: a source query log comprising query data to at least one source data collection; a target relational data generator having an output of target relational data including corrective substring suggestions that relate to the target data collection and corresponding misspelled substrings for the corrective substring suggestions extracted from the source query log; a target error model generator including an output of target statistical occurrence data including at least one of unigram statistics and bigram statistics for the substrings of the target relational data; a computer storage medium containing a target error model comprising the target statistical occurrence data; and a computer processor being a functional component of the system and facilitating generating the output of the target relational data generator and the target error model generator.
16. The system of claim 15 including a substring analyzer configured to generate source statistical occurrence data including at least one of unigram statistics and bigram statistics of queries to the at least one source data collection, wherein the target relational data is generated based on an application of the source statistical occurrence data to the source query log.