Add a shortcode you can use to display different text based on the current locale.

if-locale.php

<?php 
/**
 * This adds a new shortcode you can use to display different
 * text based on the current locale.
 */
 add_shortcode( 'if_locale', function( $atts, $content ) {
	$defaults = array(
		'language' => '',
	);

	$args = shortcode_atts( $defaults, $atts, 'if_locale' );
	
	if ( empty( $args['language'] ) ) {
		return do_shortcode( $content );
	}

	if ( $args['language'] === get_locale() ) {
		return do_shortcode( $content );
	}
	
	return '';
} );