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This super quick tutorial explains how to change the language of Google reCaptcha for USP Pro. Takes only a minute to add a code snippet to display Google reCaptcha in any supported language.

By default, the Google reCaptcha field is displayed in English. To change that to some other language, first locate the two-digit abbreviation for your language here. Then add the following code to your theme’s (or child theme’s) functions.php, or add via simple custom plugin:

function usp_recaptcha_querystring($query) { return 'en'; }
add_filter('usp_recaptcha_querystring', 'usp_recaptcha_querystring');

Notice where it says en, that is the two-character language code you want to replace with your own. Then save changes and done.