My comic features characters accidentally brought to the future from various points in history.
Naturally they all speak their own respective languages, some literate some not.
Sometimes it’s a language history recorded well other times completely unknown or not understood well.
My main character who is helping them and is also unraveling the mystery of who brought them to this time and why has a first language as English and second language from an alternative timeline from which he originates and only he and a small number of other characters speak this language.
I want to show these language differences in my comic
1) because it is not realistic everyone just speaks English
2) because I already have ideas of how language barriers play into the overall plot and a key plot point even anchors on 1 characters disinterest to learn any modern language even when they realise they probably can’t go back,
My question is how to show that characters are not speaking the same language.
Especially in early scenes when they are first struggling to communicate to each other.