Hi mpek,
We just release version support for translations, access to this page https://translate.www.ads-software.com/projects/wp-plugins/woocommerce-email-inquiry-cart-options and select the language you want to translate
Look the changelog
= 1.4.2 – 2016/09/24 =
* Tweak – Update text domain for full support of translation with new name for translate file is ‘woocommerce-email-inquiry-cart-options.po’
* Fix – Apply ‘html_entity_decode’ for email subject
* Tweak – Tested for full compatibility with WordPress version 4.6.1
* Tweak – Tested for full compatibility with PHP 7.0
* Credit – Thanks to mpek for raising the translation issue on www.ads-software.com support forum
* Credit – Thanks to WooCommerce Quotes and Orders customer John Phipps for reporting the email subject line special characters encoded bug
Regards,
Nguyen