I am a larvitar collector looking to collect every larvitar card printed. Every once in a while something pops up and throw me off, and this time its the Tyranitar EX Premium Collection cosmos holo larvitars. I’ve gotten the english ones thinking it was exclusive. But recently I found folks selling it on cardmarket in German, Italian and French.
My question is are these cosmos holos only released in English, German, Italian, French? Please don’t tell me it’s released in spanish and portuguese too.
Although I’m not 100% sure, I think you’re indeed good. If I look at the Portuguese SV product page on Bulbapedia, it isn’t mentioned (although it’s plausible this page is incomplete tbf): Scarlet & Violet Portuguese TCG Series merchandise - Bulbapedia, the community-driven Pokémon encyclopedia
And when I try to look for the product on multiple Spanish webshops, some Spanish YT channels, and through Google images using the Spanish translation, I only see the English products being sold/opened.
So although I can’t say with 100% certainty, I think that box and the Cosmos Larvitar is indeed released in just English, German, French, and Italian.
Just in case, I’d advice you to set up email alarms for that Cosmos Larvitar on CardMarket for those two languages, in case one does pop up after all, just in case. 
Greetz,
Quuador
Ah thank you for going through that trouble. I had an agonizing few hours myself looking through a ton of spanish and portuguese shops as well.
It did lead me to find a triple whammy tin that was labelled as Spanish though… so I bought that and I guess am going down the next rabbit’s hole