I will say that it's really disconcerting for an American to see the European "comma for decimal, period for thousands" notation alongside the dollar sign.
If you think that's bad, wait until you see the crazy things people do with dates. Day/Month/Year is crazy enough, but then you have people using the nonsensical Month/Day/Year.
I hold out hope that one day we'll all be using Year/Month/Day, but given how slowly the metric conversion is going I hold out little hope (as a Brit I can't apologise enough for the imperial system).
Why not just get used to it? Nowadays I only infer the meaning of commas and dots from the context. Because now matter which one you pick, someone is going to get confused.