Thank you for your kind words and thoughtful feedback!
I am glad that you found the session interesting, useful and fun. It is delightful to know that the design worked well.
The language barrier is always present in events that have international audiences. I am sorry that some of the questions were unclear and might have prevented you from answering them correctly. The purpose of the questions, however, was to engage the participants and generate discussion (and perhaps some learning). I hope that you found those aspects productive. Should I offer this presentation to an international audience in the future, I will give more time for answering the questions as you suggested.
All the questions in the presentation were tested with an international audience spanning the globe and did not reveal any issues at the time. This only reinforces the point that we need to write our questions ahead of time and test them with actual users. Even with that, some minor defects might still exist.
Have a wonderful day!
Tsvet