Alternative Menu for Second Language

Hello. I am using the Bushwick theme over on wordpress.com and find it excellent. I hope it is OK if I ask a theme-related question here.
I want to include a German translation of my page (cleartext.ch). The problem is that the theme only supports one menu at the moment so I cannot include an alternative German menu for when a user opts to switch language. This would mean that when the user clicks another link, the language would revert to English, even if they had previously selected German as their preferred language. Is there any way I could get around this problem or are there any plans to enable different menus for different pages in future? Thanks in advance for your help and all the best.