Thanks for checking this out! This library is still young — it actually started as a simple Claude artifact I built to help myself learn new languages.
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Good point! Lots of languages have regional variations (e.g. Spanish → Castilian, Latin American; French → Québécois; Chinese → Mandarin, Cantonese; Arabic → Egyptian, Levantine)
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In this early phase, I am mostly touching the surface by keeping the default/most popular ones.
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The UI defaults are limited — European Portuguese is missing, for example
If this catches your interest, I’d love to hear your ideas — we could figure out some UI tweaks and play around with the prompt 
