Nope, the exchange rate plays no role in this as I have a Euro account.
Here’s an example menu from a very popular French bistro. The filet steak frites (about 7oz) that comes with beef tallow fries and salad is 29€, the ‘smaller’ entrecôte (closer to 6oz) rings in at 24€.
Of course, there is no expectation whatsoever to tip anywhere near 20 or even 10% of the bill, which makes up for a lower total.