Ignore diacrtical needs to be specified, "[cd]" instead of "[c]".
See NSHipster: NSPredicate.
NSComparisonPredicate
Options:
NSDiacriticInsensitivePredicateOption
: A diacritic-insensitive predicate. You represent this option in a predicate format string using a [d] following a string operation (for example, "naïve" like[d] "naive").
Such a common error, it kept me from finding my Metro Station in Paris.