eleti

@nathair perhaps you can try this (it’s an expansion from the solution provided by krko)

In the same file recaptcha.php under modules folder line 240, add the checking of the language (in my case it’s either English or Japanese by default, so please change accordingly):

function wpcf7_recaptcha_enqueue_scripts() {
	$url = 'https://www.google.com/recaptcha/api.js';

	$lang = get_bloginfo('language');
        if ( $lang === 'en-US' ) {
		$url = add_query_arg( array(
			'onload' => 'recaptchaCallback',
			'hl' => 'en',
			'render' => 'explicit' ), $url );
	} else {
		$url = add_query_arg( array(
			'onload' => 'recaptchaCallback',
			'hl' => 'ja',
			'render' => 'explicit' ), $url );
	}

	wp_register_script( 'google-recaptcha', $url, array(), '2.0', true );
}

All the best,
Eunike