As I switch between my Spanish and German skill tree and overall on the desktop version of Duolingo, I can see only my top streak (which is the Spanish's one) on both pages.
But! If I check it on the mobile version (the Android one), it distinguishes my Spanish streak and my German streak.
I'd like to see the actual streaks for every language everywhere. And maybe some kind of summary (graph?) for those learning more languages at the same time?