[fungizid]

With a fixed exchange rate, the choice of currency does not matter for Benford’s law.

Benfords’s law states that for many real-life numbers x, log(x) is uniform.

Converting to another currency using exchange rate E, so that y = E*x, yields log(y) = log(E) + log(x). This corresponds to a shift of the distribution of log(x) and does not change how uniform the distribution is.

However, if the exchange rate varies with prices, then it will matter.