El Corte Ingles, a Spanish retailer, listed Fallout 4 in its “Game of the Year Edition” for Nintendo Switch. If I not mistaken, some years ago, El Corte Ingles agglomerates the 15% of the Spanish videogames market. Nowadays with the entrance of Amazon, the situation could be totally different. Abroad from Spain, El Corte Ingles is not a known franchise, but is important in the country.

what [Rumor] Fallout 4 GOTY Ed listed by Spanish retailer for Switch | VGLeaks 2.0

The game could have listed by error, but the retailer updated the page removing the release date and keeping the listing overall. That movement could add a thin layer of confidence.

Thanks, GoNintendo.