Cards of different languages in a single deck

meonmeonmeon

I just moved from Indonesia to the UK and I brought a lot of my core deck cards with me alongside it, so all of my cards currently are in Indonesian. I am missing a couple of cards to build a deck, and I am able to fill in the gaps using official English cards, but is the deck tournament legal if I have a mix of English and Indonesian cards? I saw that in these cases you need to have an English equivalent of the card or an official record from a site outside of the deck, but I couldn't find a definite yes or no answer on having cards of different languages in my deck.