Test, validate and match regular expressions
Matches one or more characters that are Unicode letters (\pL) or combining marks (\pM), enabling it to match text in virtually any language, including accented and diacritic characters. It also permits spaces, underscores, digits, and common punctuation/symbols such as ( ) $ & " ' ! @ ^ = + * - /. Ideal for validating UTF-8 text input like international names, phrases, or free-text fields in forms.