For the text layout when it comes to filming for the Korean Englishman videos I'll make it look like a transcript so that its easier to see who's talking;
Example:
Josh: today were gonna try something different
Max: Oh no is it gonna be bad or something, I'm freaking out man!
Armand: Max! Chill out he hasn't even fully began yet and you're already having a full meltdown
Then normal paragraphs for the story line
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and I'll put actual korean word in with how to say it and what it means in English underneath;
Example:
Korean word
(how to say it)
[what it means in English]
* * * * * * * * * * * * * * * * * * *
Also any french words would most likely be spoken between the main characters so they'll most likely be in bold or italics or in a completely different font.
And stuff like time skips, flashbacks, fastforwards will be done as normal with these used;
Example:
<<< time skip >>>
Also the main character lives with her grandmother in a different country from the rest of her family but there will be mentions of her family every now and then and maybe we'll get to meet the full family further in the story.