Jack is a notable polygot. He speaks fluently in English and French, as well as Spanish; unlike the other two, his Spanish is slow, and he can be lost when conversation grows rapid.

On top of this, he also speaks Cantonese well enough to maintain basic, if brisk conversation and enough Swedish and Bantu to get by.

He was exposed to Umshoko only twice in his life, but he picked it up well enough to utilize it in order to keep local natives from cannibalising him before rescue could be arranged.

However, of these languages Jack can only write in English, though he can generally parse his way through reading Spanish, he does at times need to write them out in English when contextual efforts otherwise fail him in deducing things. He cannot read or write in any of the other languages he speaks in, nor would he try to guess at it.

Latin and Greek are considered the ‘high education’ languages and he has had little exposure to either of them, nor is he particularly interested in picking them up as more often than not any time he does encounter them, it is with someone who knows what they’re about enough to get by.