wordpress西班牙语语言代码返回false值

Question

On my spanish Wordpress site, I'm using get_bloginfo('language') code for getting the language code. It's been working properly for last 2 years. Suddenly it returns the wrong value in the live environment. My local environment is working properly.

My code:

<?php echo get_bloginfo('language');?>

The above code return below values:
correct value : es-ES
wrong value : es

I need the result for es-ES

Answer 1

Use this function:

get_locale();

Retrieves the current locale, in your case, es_ES, with low bar.

More info -> https://developer.wordpress.org/reference/functions/get_locale/