@SeamusDubh
Ill add to this
If for some reason there is a pop culture reference or some kind of meme, you have tow roads you can go down,
1) translate verbatim and give a note with context at the end of if its short enough, in margins,
2) change the reference to something someone could easily look up or possibly even know from a country that uses the language translated into.
professionals use to do 2, but most of the scanlation readers prefer 1
there is some exceptions, japans youtube has that scrolling text on screen and they will have just long strings of characters, most of the time there is an english equivalent, it's a judgement call on how you handle it because both are seen as ok.
I do recommend if something is changed, you make a note of it on a separate page.
something more common is a character having an accent. if you can translate it in a way that is easy to read while imparting the accent, go for it, but if you can't, just don't and make note of it. I think everyone has read some elizabethan esque dialogue, and sat there for far to long trying to parse it, it's better to just translate to a common in this case. you MAY want to use a different font for this, signify something is different, but don't pick something that is horrendously hard to read just because its fancy, even just italics can be sufficient.