Internationalizing a ClassicPress plugin: What is a Text Domain and how is it specified?

ClassicPress PluginsThis post is part of the sub-series on Internationalizing a ClassicPress plugin which is part of the Internationalizing a ClassicPress plugin series.

A text domain is a unique identifier which makes sure ClassicPress can distinguish between all loaded translations and apply the correct one.

The text domain should be a unique string, not used by any other translation (which would include plugins and themes) and so is recommended to match the plugin slug. So if you have a plugin with the slug of my-classicpress-plugin the text domain should be the same.

If the text domain matches the plugin slug, ClassicPress does not require the text domain to be defined in th plugin header (although it is very much recommended that it does i order to avoid collisions with other plugins or themes), but if the text domain is different to the plugin slug, then you need to include the following highlighted line in the header:

/*
 * Plugin Name: My ClassicPress Plugin
 * Author: Ian Grieve
 * Text Domain: my-classicpress-plugin
 */

One important point to remember, is that a text domain cannot include underscores.

Translating a ClassicPress plugin

Translating a ClassicPress plugin
What is Internationalization and Localization?
Why is Internationalization and Localization important?
When should a plugin be internationalized?
Internationalizing a ClassicPress plugin: How does internationalization work?
Internationalizing a ClassicPress plugin: What is a Text Domain and how is it specified?
Internationalizing a ClassicPress plugin: Localization functions
Internationalizing a ClassicPress plugin: Which localization functions to use?
Internationalizing a ClassicPress plugin: Localizing a string
Internationalizing a ClassicPress plugin: Don't paramaterize your text domain
Internationalizing a ClassicPress plugin: Localizing a string containing a parameter
Internationalizing a ClassicPress plugin: Localizing a string including plurals
Internationalizing a ClassicPress plugin: Localizing a string including notes for the translator
Internationalizing a ClassicPress plugin: Don't include HTML markup in localization
Internationalizing a ClassicPress plugin: Don't localize URLs
Internationalizing a ClassicPress plugin: Localizing a string including line breaks
Internationalizing a ClassicPress plugin: Load plugin translations
Translating a ClassicPress plugin with Poedit: What is Poedit?
Translating a ClassicPress plugin with Poedit: Download Poedit
Translating a ClassicPress plugin with Poedit: Install Poedit
Translating a ClassicPress plugin with Poedit: Create New Translation Template
Translating a ClassicPress plugin with Poedit: Create Translations
Translating a ClassicPress plugin with GlotPress: What is GlotPress?
Translating a ClassicPress plugin with GlotPress: Download and install GlotPress
Translating a ClassicPress plugin with GlotPress: Creating administrators
Translating a ClassicPress plugin with GlotPress: Create a project
Translating a ClassicPress plugin with GlotPress: Import translation template
Translating a ClassicPress plugin with GlotPress: Import translations
Translating a ClassicPress plugin with GlotPress: Create new translation set
Translating a ClassicPress plugin with GlotPress: Export translations
Internationalizing a ClassicPress plugin
How does internationalization work?
What is a Text Domain and how is it specified?
Localization functions
Which localization functions to use?
Localizing a string
Don't paramaterize your text domain
Localizing a string containing a parameter
Localizing a string including plurals
Localizing a string including notes for the translator
Don't include HTML markup in localization
Don't localize URLs
Localizing a string including line breaks
Load plugin translations

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