ex_money is built upon ex_cldr so localisation is an intrinsic part of the library:
iex> m = Money.new(:USD, 100)
Money.new(:USD, "100")
# Locale-specific formatting
iex> Money.to_string(m, locale: :de)
{:ok, "100,00 $"}
iex> Money.to_string(m, locale: :de, format: :long)
{:ok, "100 US-Dollar"}
iex> Money.to_string(m, locale: :es, format: :long)
{:ok, "100 dólares estadounidenses"}
# Locale specific parsing (which take care to understand
# the locales decimal and grouping separators
iex> Money.parse("100,00 $", locale: :de)
Money.new(:USD, "100.00")
# Return display names that can be used in UI for
# example, as column headings
iex> Cldr.Currency.display_name :USD, locale: :de
{:ok, "US-Dollar"}
iex> Cldr.Currency.display_name :USD, locale: :ar
{:ok, "دولار أمريكي"}
And although not strictly localisation, ex_money knows all the ISO4217 currency formats so rounding is done to the correct number of digits when required and formatting displays the correct number of decimals. For example:
# JPY has no decimal places (in common use at least)
iex> Money.to_string Money.new(:JPY, 54321)
{:ok, "¥54,321"}
# Tunisian Dinar has three decimal places
iex> Money.to_string Money.new(:TND, "1000.12345")
{:ok, "TND 1,000.123"}
# Swiss Franc cash smallest unit is 5 centimes.
# Rounding is `:half_even`
iex> Money.round Money.new(:CHF, "123.73"), currency_digits: :cash
Money.new(:CHF, "123.75")