Hello and congratulations for your plugin, it works very well.
However I am facing a last problem with the flags which must be resolved.
I have a multisite e-commerce(4 url in subdirectory) with 3 countries and 4 languages. French, German and English (United Kingdom => en_GB) that works with tax and legal requirements of the European Community. The fourth language is English with the U.S. flag (en_US) entitled "International" for export without tax and with different delivery methods.
I can not display the U.S. flag and GB separately. This is so all U.S. or UK. I tried with another image directory or changing the filename png U.S., it does not work ...
Thank you for giving me the solution if you have a ...Cordially