I noticed some strange malfunctions, but ONLY when French is selected (at the bottom of the page), NOT with any of the other available languages:
1) Button "Show Voter" for a topic
=> doesn't show anything (but neighbor Button "Report" for menu seems OK)
2) Blue button "+" to add comment
=> doesn't do anything
3) Different results with Search field
=> Type "French" in the Search field
=> Only 1 answer from http://feedback.userecho.com/?lang=fr
=> Many answers from http://feedback.userecho.com/?lang=en
4) Less topics displayed in welcome page
e.g. http://feedback.inst.ag from your CLIENTS examples
=> No topics presented if French is selected
=> Many topics if any of the 9 other languages is selected
Maybe there are other "strange things" not reported here and only related to French...
It's surprising that it's focused on this language only.
Customer support service by UserEcho