[Jtsummers]

As maxerickson said, the common English use is not the literal Latin translation. "The man came crauling [sic] down the hallway." The [sic] means that the misspelling or error has been left in for some reason. Other ways to express what you intended:

Original: Real time exchangers [sic: merchants] will settle on slightly less than normal exchange rates.

Alternative: Real time exchangers (e.g., merchants) will settle on slightly less than normal exchange rates.

Alternative: Real time exchangers, such as merchants, will settle on slightly less than normal exchange rates.

[aosmith]

This was bugging me too, so now it's fixed. Thanks!