Bug with the localization

Hello gvectors team

I discovered a bug in the plugin translation: the very "Post Comment" button can not be localized!

If one uses the translation forms in the admin backend, there is no field for it. And if I activate the use of PO files, everything gets translated correctly except the 'Post Comment' button, whose translation is found in the core WP PO files.

If I deactivate your plugin, the button translates as expected.

Do you have a (quick) fix for this?

Thank you