WordPress at a glance
function is not described

wp_install_language_form() WP 4.0.0

Output the select form for the language selection on the installation screen.

  • Global. String. $wp_local_package

No Hooks.

Return

Nothing (null).

Usage

wp_install_language_form( $languages );
$languages(array) (required)
Array of available languages (populated via the Translation API).

Code of wp install language form: wp-admin/includes/translation-install.php VER 5.0.3

<?php
function wp_install_language_form( $languages ) {
	global $wp_local_package;

	$installed_languages = get_available_languages();

	echo "<label class='screen-reader-text' for='language'>Select a default language</label>\n";
	echo "<select size='14' name='language' id='language'>\n";
	echo '<option value="" lang="en" selected="selected" data-continue="Continue" data-installed="1">English (United States)</option>';
	echo "\n";

	if ( ! empty( $wp_local_package ) && isset( $languages[ $wp_local_package ] ) ) {
		if ( isset( $languages[ $wp_local_package ] ) ) {
			$language = $languages[ $wp_local_package ];
			printf( '<option value="%s" lang="%s" data-continue="%s"%s>%s</option>' . "\n",
				esc_attr( $language['language'] ),
				esc_attr( current( $language['iso'] ) ),
				esc_attr( $language['strings']['continue'] ),
				in_array( $language['language'], $installed_languages ) ? ' data-installed="1"' : '',
				esc_html( $language['native_name'] ) );

			unset( $languages[ $wp_local_package ] );
		}
	}

	foreach ( $languages as $language ) {
		printf( '<option value="%s" lang="%s" data-continue="%s"%s>%s</option>' . "\n",
			esc_attr( $language['language'] ),
			esc_attr( current( $language['iso'] ) ),
			esc_attr( $language['strings']['continue'] ),
			in_array( $language['language'], $installed_languages ) ? ' data-installed="1"' : '',
			esc_html( $language['native_name'] ) );
	}
	echo "</select>\n";
	echo '<p class="step"><span class="spinner"></span><input id="language-continue" type="submit" class="button button-primary button-large" value="Continue" /></p>';
}