XAMPP is a great software containing Apache, MySQL, PHP, File server and many other modules/programs that make web development much easier.

But sometimes after installation and selecting English language as default the selection will not affect phpMyAdmin and its interface is in German.

The trick is simple, you will need to look up the phpMyAdmin folder inside the installation root, then you will find config.inc.php file, open it, then paste these two lines of code at the very top of the page:

{code class="brush: php;"}$cfg['DefaultLang'] = 'en-utf-8'; // Language if no other language is recognized{/code}

or

{code class="brush: php;"}$cfg['Lang'] = 'en-utf-8'; // Force this language for all users{/code}

Save the file and reopen phpMyAdmin

Taken from this Blog