Add meta description multilanguages

Hi,
I would like to add meta description just in the homepage because when i searched on the google with my company name, it doesn’t got meta description form my static page that’s why i want to add it again, i used this code in the header.php
————————–code————————

if ( is_home() || is_front_page() && $_GET["lang"] == "fr") { ?>
    <meta name="description" content="description in French" />
<?php }  elseif ( is_home() || is_front_page() && $_GET["lang"] == "en"){ ?>
<meta name="description" content="description in English" />
<?php } ?>

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I would lave to know if it’s correct because i uses yost seo for each page and every things well just on google name of company didn’ got my description of my frontpage.
Thnak you.

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