Error in the debug mode

Hello!
Thank you for the great plugin.

But, The following error appears in the debug mode.

Notice: Undefined variable: languge_code in ********** \ wp-content \ plugins \ google-language-translator \ google-language-translator.php on line 260

240 rows “$language_code”
260 rows “$languge_code”

https://ww.wp.xz.cn/plugins/google-language-translator/