Regular Expressions

Regular Expressions can be used in various features in your Localize dashboard.

A number of features in your Localize dashboard allow you to enter a Regular Expression or "regex", including:

  1. Disable Localize by Page
  2. Disable Phrase Detection by Page
  3. Define Variables in Your Dynamic Phrases
  4. Block New Phrases by Pattern

Examples of Regular Expressions

The following are examples of some common Regular Expressions that you might find in your content.

ItemRegular ExpressionExamples
Date With Slashes\d{1,2}\/\d{1,2}\/\d{4}1/2/2020
Date with Dashes and text-based 3-letter month\d{1,2}-[A-Z]{1}[a-z]{2}-\d{4}11-Jan-2014
Date and time[a-z,A-Z]{3} \d{1,2}, \d{4} \d{1,2}:\d{2} [A,a,P,p][M,m]Aug 9, 2021 10:20 AM
Sep 11, 1964 10:20 pm
Short time\d{1,2}:\d{2} [A,a,P,p][M,m]12:34 PM
5:14 am
Countdown Timer (HH:MM:SS)\d{2}:\d{2}:\d{2}12:42:22
Brand name or other specific wordLocalizeAny phrase whose content contains the string literal "Localize" anywhere in it
Specific ID #s
(e.g. US social security #)
Specific word: dog^dog$Any phrase whose content is exactly "dog"

Special Characters in Regular Expressions

Special Characters

Regular expressions use special characters (metacharacters) to denote which characters to match in the source content. You must be careful when adding words/phrases to this list so that they aren't interpreted differently than you expect them to be.

The special characters are:

  • backslash \
  • caret ^
  • dollar sign $
  • period or dot .
  • vertical bar or pipe symbol |
  • question mark ?
  • asterisk or star *
  • plus sign +
  • opening parenthesis (
  • closing parenthesis )
  • opening square bracket [
  • opening curly brace {


Any special characters that can be used in regular expressions will need to be "escaped" if you want to match the literal character.

For example: If you want to exclude anything with .tif in the phrase, you would enter: \.tif

  • The backslash tells the parser to consider the "." as a literal character.
  • Without the backslash, the .tif would include any phrase that has at least one character before tif, e.g. any phrase with the word "identify", etc.

Unicode Regular Expressions

When using the Block New Phrases by Pattern setting, you can select the Unicode Regex option. This will automatically add the Unicode modifier /u to the end of the regex.

This allows you to support the blocking of phrases based on Unicode content.

ItemRegular ExpressionExamples
Block phrases with Cyrillic characters
(e.g. Ukrainian, Bulgarian, etc.)
[\p{sc=Cyrillic}]Заблокуйте цю фразу.
Block phrases with Chinese hieroglyphs[\p{sc=Han}]屏蔽这句话。