Simple name matching Matches english names only, you may add international characters to list of characters.

See http://tools.ietf.org/html/rfc2045#section-5.1

Corregir la falta de punto cuando se abre un signo de exclamación o interrogación para el idioma español.

Breaks file path up into wrappers, root, and path components. Understands both Windows (DOS) and Unix style paths. Wrappers and path components can be farther processed in code. Path component should support any visible Unicode character but not things like VT, HT or any other non-printing character...

This reges searches all abbreviations of command "var|iable" in multiline script

You can use it as a language selector.

Regex to match part of minecraft command entity targets

oneliner SOA record matching regexp. like "ns1.domain.com.ge. mail.ns1.domain.com.ge. (2014061613 3600 600 604800 1800 )" without @ IN SOA in begging, usefull when implementing something like DNS GUI.

This will find all instances where the WP i18n function __() is used, and change the text domain to something else. This will recognize instances of the function use as separate, even if they appear in the same function

Test regex for question.