Check the Internationalization Guidelines and learn what each i18n function is for, how to use them, and the best practices when writing your strings.

Basic functions

• __()
• _e()
• _x()
• _ex()
• _n()
• _nx()
• _n_noop()
• _nx_noop()
• translate_nooped_plural()

Translate & Escape functions

Strings that require translation and is used in attributes of html tags must be escaped.

• esc_html__()
• esc_html_e()
• esc_html_x()
• esc_attr__()
• esc_attr_e()
• esc_attr_x()

Date and number functions

• number_format_i18n()
• date_i18n()

Functions also available in javascript

• __()
• _x()
• _n()
• _nx()
• sprintf()

Note: To be able to use these functions available in your javascript, you have to set up your plugin/theme javascript localization.