Could another country build capital ships?

Which countries outside the major treaty powers could build capital ships in the interwar period?

None had a complete, readily usable independent capability: Soviet, German, and Spanish capacity was each compromised in a different way.

Soviet, German, and Spanish capital-ship programs each faced severe industrial limitations. The Soviet Union had theoretical capacity but destroyed much of the skilled human infrastructure through purges, while Germany had to rebuild after the Treaty of Versailles. Spain's Espana class did not prove a self-sufficient system because the ships came from a British-owned yard in Spain and the program did not continue. Battleship construction required the ability to supply all the necessary systems and skills, which purchasing a finished battleship did not establish.