Press the green flag. The person will say the question in welsh and then At the bottom of the screen it will say what the question is. Answer the question and it will say your answer in Welsh. Then it will say the next question in Welsh and so on.
Here is a link to my French language converter: https://scratch.mit.edu/projects/397791467 Created: may 24th 2020 (24.5.2020) Shared: may 28th 2020 (28.5.2020)