Multi Currency ecommerce tracking

Is this still the case? I need to track which currency is selected for a given transaction. We support multiple currencies, and allow customers to select their preference. In Google Analytics, we just set currency to the eventLabel, and then total_amount to the eventValue.

On this page: Track Goals and Measure Conversions - Analytics Platform - Piwik
I see that we just _paq.push([‘trackGoal’, 7, priceOfMyObject]); but still need somewhere to put the currency?