Discussion participation links inactive in Activity (アクテイビテイ)。
Usually, when I comment on a Discussion or post a Discussion, a link to that discussion shows up in my activity stream when i am in my other courses. However, the link is not active in my English for Japanese speakers course. I don't know if this is a glitch, or if it is because the course is still in beta.
It looks like in order to post in the Japanese Troubleshooting forum, you have to subscribe to it. If you're reporting problems with the Japanese -> English course, this may be a good idea. I've sent the message along to the Incubator mods for this one though, as its a translation issue.
I'll also add a fix soon so that it shows the ui language Troubleshooting forum in that ui language regardless of if you're subscribed to another one. Thanks!