Just a quick question about the WLM 2021 template that we are trying to add to WLM uploads made via the Commons app. We currently retrieve the country that a monument is in, then convert it to the two-letter country code and insert it into the template. 

However we are still getting errors; as shown at https://commons.wikimedia.org/wiki/File:Newstead_Gasworks_4.jpg , I have uploaded a test image with the template {{Wiki Loves Monuments 2021 |1= au}} but the page says "English: No or incorrect country code indicated in the {{Wiki Loves Monuments 2021}} template". I have experimented with various other country codes listed at https://commons.wikimedia.org/wiki/Template:Wiki_Loves_Monuments_country_logos ; interestingly some like "al" or "ad" do not work, but "ie" does.

TLDR: Does the template only accept some countries and not others, perhaps only countries participating in WLM 2021? Is it possible for us to get a machine-readable list of these countries?

Thanks!