From the article: Atlas Obscura spoke with El Shami-Mader about her project, the challenges of depicting mythical creatures, and the appeal of the lovable Squonk. If you’d like to suggest a creature, email her at mythical.creaturologist@gmail.com.

Judging from: https://www.instagram.com/alch.imi/ I'd say that she still has a way to go before depicting all mythical creatures.

Word "yes" in romance languages. Basque is not a romance language.

Gaulish is the language the French spoke before early French started happening, so its inclusion seems normal to me. And I indeed skimmed the article.