Theme translation readiness in Wordpress - Step-by-Step Execution

Concept Flow - Theme translation readiness

Start: Theme code

↓

Load text domain

↓

Wrap strings with translation functions

↓

Generate .pot file

↓

Translate .pot to .po/.mo

↓

Load translations at runtime

↓

Display translated strings

↓

End

This flow shows how a WordPress theme prepares for translation by loading text domains, wrapping strings, generating translation files, and displaying translated text.

Execution Sample

Wordpress

<?php
load_theme_textdomain('mytheme', get_template_directory() . '/languages');
echo __('Hello, world!', 'mytheme');
?>

This code loads the theme's text domain and outputs a translatable string.

Execution Table

Step	Action	Function Called	Input String	Output String	Notes
1	Load text domain	load_theme_textdomain('mytheme', get_template_directory() . '/languages')	-	Text domain 'mytheme' loaded	Makes translations available
2	Call translation function	__('Hello, world!', 'mytheme')	Hello, world!	Hello, world!	No translation file yet, so original string shown
3	Add translation file	mytheme-fr_FR.mo loaded	-	-	French translation file loaded
4	Call translation function again	__('Hello, world!', 'mytheme')	Hello, world!	Bonjour, le monde!	Translated string shown
5	End	-	-	-	Theme displays translated text if available

💡 Translation files loaded or not determines if string is translated or original

Variable Tracker

Variable	Start	After Step 1	After Step 3	Final
text_domain_loaded	false	true	true	true
current_language	default (en_US)	default (en_US)	fr_FR	fr_FR
displayed_string	''	'Hello, world!'	'Hello, world!'	'Bonjour, le monde!'

Key Moments - 3 Insights

Why does the string show in English even after wrapping with __()?

Because the translation file (.mo) for the current language is not loaded yet, so the original string is displayed as shown in execution_table step 2.

What does load_theme_textdomain() do?

It tells WordPress where to find translation files for the theme, enabling translated strings to be loaded, as seen in execution_table step 1.

How does WordPress know which string to translate?

By using the translation function __() with the exact original string and the text domain, WordPress looks up the translation in the loaded .mo files, shown in steps 2 and 4.

Visual Quiz - 3 Questions

Look at the execution_table, what is the output string at step 2?

A Bonjour, le monde!

B Translation missing

C Hello, world!

D Error

💡 Hint

Check the Output String column at step 2 in the execution_table.

At which step does the theme load the French translation file?

A Step 3

B Step 1

C Step 4

D Step 5

💡 Hint

Look for the row mentioning '.mo loaded' in the Function Called column.

If load_theme_textdomain() was not called, what would happen to the output string?

A It would show the translated string

B It would show the original string

C It would cause a fatal error

D It would show an empty string

💡 Hint

Refer to variable_tracker for text_domain_loaded variable and execution_table step 2.

Concept Snapshot

Theme translation readiness in WordPress:
- Use load_theme_textdomain() to load translations
- Wrap strings with __() or _e() with text domain
- Generate .pot file for translators
- Translate .pot to .po/.mo files
- Load .mo files at runtime
- Display translated strings if available

Full Transcript

This visual execution shows how a WordPress theme becomes ready for translation. First, the theme loads its text domain with load_theme_textdomain(), telling WordPress where to find translation files. Then, strings in the theme are wrapped with translation functions like __() using the text domain. Initially, without translation files loaded, the original English strings display. When translation files (.mo) for another language are loaded, the same translation functions output the translated strings. Variables like text_domain_loaded and current_language track the state. Key moments include understanding why strings show untranslated initially and the role of load_theme_textdomain(). The quiz tests understanding of output strings at different steps and the effect of loading translation files.