The Rosalina Guitar image was removed in an update, add details.
Figure out exactly what prevents the unused Latin American Spanish localization from loading properly.
Mario + Rabbids Sparks of Hope is the long-awaited sequel to Mario + Rabbids Kingdom Battle, this time based off of Super Mario Galaxy. It's also notable for being one of the last original Mario games to feature the voice of Charles Martinet, prior to his retirement from voice acting Mario characters in 2023.
Found in an folder named "launcher". Filenames with "map" are cover arts of developer maps, "bbb" meaning it's a playable world and "dsr" meaning it's for the DLC. Assumed to be used in Ubisoft's level editor.
map_dojo_gameelement_showcase is a cover image for a new developer map titled Dojo Game Element Showcase, showing Mario animation-less and in his default pose on another test map.
map_dojo_showroom_summer appears to be a wide shot of an early untextured Beacon Beach.
map_ui_dojo shows an early version of Beacon Beach with some minor changes. The name still says it's part of a Dojo developer map, most likely the Dojo Showroom Summer due to being the only Dojo map with Beacon Beach.
map_dojo_sparks is a screenshot of a green checkered floor found in Hero's Skill Tree, which instead shows a queue of Marios with every spark and some other things for testing, also showing a screenshot of the dev map named Gojo Sparks.
map_dojo_combat shows art of Mario firing some what appears to be a pair of Pyrostars out of his Dual Slingers. The name suggests that this is a combat testing map.
map_dojo_cogload is a stock photo cover of a map named Dojo Cogload. Cog-load could be a term for Cognitive load (amount of working memory being used).
map_playground_fourseasons_fpp is the same as the "map_playground_fourseasons" but with "FPP" written in big red letters on top of it, presumably meaning 'first-person perspective'. Perhaps it would've used the unused first-person perspective mode.
map_test_switch_world shows a screenshot of a green tiled floor, similar to the one in the map shown in the general cover image for Dojo maps, with two switches on in the developer map Test Switch World. Mario appears once again in his default pose.
first_time_notification_freetoads_01 is a placeholder image used in the image tutorials found around the game, this one says, "FREE TOADS IMAGE PLACEHOLDER".
In western versions of the game, separate America-specific localization folders can be found for French and Spanish along with the standard European variants. The localized text files contained within are largely identical to their non-American counterparts, aside from some minor formatting adjustments and any lines where Rosalina, Rabbid Rosalina, Magikoopas and (in Spanish) Bob-ombs are mentioned by name being edited to use the localized names for their respective language in American regions. Said edited lines are conspicuously moved to the top of the localized text files in question, although their internal IDs still correspond. While the American French localization files load as expected when the Nintendo Switch system's region is set to the Americas (or on a Nintendo Switch 2, the system language is set to Canadian French), the same isn't true for American Spanish for whatever reason, where instead the European Spanish files are always loaded when the system language is set to Spanish regardless of region.
It should also be noted that the game does not have separate localized voice files for American French and Spanish, only text. This may explain why American Spanish was rendered inaccessible, as Rosalina and Rabbid Rosalina's localized European Spanish names are spoken aloud at points in the Spanish dub, which would necessitate re-dubbing of at least those lines in particular to avoid discrepancies. The French dub, on the other hand, sidesteps this by avoiding having those particular characters' names spoken aloud in voiced dialogue for the most part (even when they're still present in the subtitles), instead generally substituting their names in the voice acting with more generic epithets like "l'héroïne", or "the heroine". However, there remain a few instances of Rosalina and Rabbid Rosalina's European French names being spoken in certain voice clips, leading to a mismatch between the names used in the voice acting and subtitles in those instances when playing in Canadian French.
(Source: PaperSplash, Sparks (Super Mario Wiki), Polo (YouTube))