Starting version 3.5, the WhatPulse client supports multiple languages. You can select the language in the General Settings, as shown here:
After selecting the language you want to use, hit the Save button. Then close and reopen the client window to have the new language take effect!
If you would like to help make a new language available for yourself or your fellow citizens, you can! We have open-sourced the language files and would be happy to get contributions. Find all info about the translations here: https://github.com/whatpulse/client-translations
Here's a list of incredible people that have contributed: