Could the Russian alphabet itself be integrated into the comic's visual design, even if the main language is Spanish?

Absolutely. While the main narrative is in Spanish, subtle integration of the Cyrillic alphabet could add depth and symbolism. This could manifest as background details (e.g., Cyrillic script appearing on ancient artifacts), code or secret messages within the comic, or even as visual metaphors. The Cyrillic letters could be subtly incorporated into character designs or environmental elements to hint at hidden connections or ancestral influences.