##Install package for implement build file type .po
   https://github.com/grappler/i18n
##Commandline for build file type .po
    php D:\doc\source_code\local.upshipping.vn\i18n\makepot.php wp-plugin D:\doc\source_code\local.upshipping.vn\wp-content\plugins\ups-eu-woocommerce      
##Convert file type .po to .mo
        http://po2mo.net/
        https://localise.biz/free/poeditor