é or ü), and an empty value is treated as matching because it has no disallowed characters. Spaces are not allowed, so a name made of two words separated by a space does not match.
String: Contains only alphabetic characters
Checks that a string contains only alphabetic characters.
Checks that a string contains only alphabetic characters. A value passes when every character is a letter, with no digits, spaces, or punctuation mixed in. Use this to confirm that a value holds plain text and nothing else, for example to accept a country or category name while rejecting anything that contains numbers or symbols. Letters from any language count as letters (including accented ones such as