Yep! "Slave Trade" is another one of their techs/team bonuses: Effect: Allied Slaves -50% train time as long as the Scythians maintain a Market.

That would be hard, at most I know Schmitt has done plenty of work on the matter (https://www.iranicaonline.org/articles/scythian-language-2), but I doubt there's enough for all the words needed.   But I didn't mean that, what I meant is alternatives for things like "Advanced Metallurgy", which is not clear to what it refers to, exactly. "Goldsmithing" comes from before, and many others had it, maybe I'd go with "Sophisticated Goldsmithing", referring to Stage 2 ("second half of the 6th to the first half of the 4th centuries BC") and Stage 3 ("mid-4th to 3rd centuries BC") Animal Style themes (just saying something like that would be too technical, but could be mentioned in its description). I'd call "Gorytos Bow-and-Quiver System" just "Gorytos", the rest is just part of the tech description, unnecessary for its title (at most adding "bow case"). You mention Goldsmithing as Market bonus, but in truth (from the book I mentioned) "what was traded and transported from the forest-steppe to the Greek colonies and possibly from there the Greek homeland is still an enigma, and thus any suggestion is (again) rather speculative. What is known more definitively is what was provided in return for these trade goods. Across temperate Europe and the Pontic forest-steppe and steppe, there was a growing demand for wine and Attic Greek drinking and serving equipment, including silver, gold, and black figured vessels, such as the rhyton and kylix. Nadezhda Gavrilyuk suggests that the wine trade with the inhabitants of the Pontic region, including the steppe and forest-steppe groups, was especially prolific and, as a result, highly profitable". So, wine was an import, not an export, that's why I'm not sure if to actually consider it for a tech. Regarding export speculation, slaves rank high in the time-frame of the game: https://antikmuseet.au.dk/fileadmin/www.antikmuseet.au.dk/Pontosfiler/BSS_1/BSS1_08_Gavriljuk.pdf. Honey seems to have been another export (https://www.cambridge.org/core/journals/classical-quarterly/article/abs/export-of-slaves-from-colchis/AF78278141AA9AA6877B702240B161F3), while grain is quite controversial, when comparing those links with https://www.iranicaonline.org/articles/black-sea.

Concept for a new Temple design? New Civic Center design?  

I'm currently using Ossetian for specific names, but if you come up with something closer, let me know.