@JTT,
JTT wrote:Is this followed for all currencies, Walter? 10$
There is often a space after the figures, and the currency unit/cent separator would be a comma. Amounts of less than one currency unit usually have a zero before the commas: en 2010 à la mi-février le taux de change euro/dollar s'établit à 1 € = 1,36 $ and Umrechnungfaktoren: 1 DM = 0,51129 €.
In speech, you would use the appropriate word or phrase for the amount, dieci, trenta, einundvierzig, quatre-vingts-dix-neuf, and then the name of the currency, singular or plural as appropriate, and then any cents. For $10.50 a French person could say "dix dollars cinquante", or "dix dollars cinquante des États-Unis" or "dix dollars cinquante américains" or "dix cinquante dollars US" or "dix USD cinquante". (You also have dollars canadiens, australiens, etc.)