What is the phone number to call SNCF from the US and speak to a customer service representative in English?
+33 1 84 94 3635, open from 8:00 to 20:00 CET. There should be some there that speak english.
If you're French challenged like me, you can say "English" then dial "#85" and that'll get you to the queue for an English speaking agent. Best time to call is mid-day in France, otherwise the wait can be lengthy.