Castilian ia a region of Spain where the “Spanish” language comes from. But there is not the only language there, and there was repression against the other languages there, specially the basque language.

So, call that language Castilian ia also recognize that other languages exists within the country.

(I’m not spanish nor a speaker, so, I may be wrong)

I like this one:

Dekatrian Calendar (translated to english)

Calendário Dekatrian (original)

May be useful:

SI is great, but if you reset everything (and lose all tech and most of knowledge), just create a new system. Embrace what makes SI great (easy conversions and a the nature-based properties) and do it over.

For length, use Hydrogen line when you advance your society enough. It’s more universal than using 🌎 as a 📏.

Will you use the sea borders instead of the coastline to avoid the paradox?

I didn’t even know that neutrons have an antiparticle. TIL

Edit: neurons -> neutrons