(2) If this card you control would be used as Synchro Material, you can treat it as a non-Tuner
Official Pokemon TCG rules require cards in the language of the event
Ive got a fair number of other cards that sacrifice for profit: Im super-excited about World Shaper here, which can be sacrificed to bring back any lands that have ended up in the graveyard (such as to fuel Korvold)
Whether its fetching up Vexing Bauble to deal with free interaction, or Soulless Jailer to shut down graveyard decks, the possibilities here are limitless
I personally like Japanese FNM promos ([card]Grisly Salvage[/card] especially), so you can browse that website for promo cards to see what language they are in
Once you inevitably start exploring formats outside of just Standard or Modern and dig through older cards, promos, bonus sheets, serialized cards, alternate treatments, and whatever stunning nonsense Wizards decided to put in Collector Boosters this time around, rarities will start looking a bit messier