If that’s in response to the original poster, then yes, he is - he says he’s on Lesson 9 of the second SaySomethinginWelsh course, which was written by a native English speaker… 
But this might not be the best possible place for you to tell people that working from materials written by a native English speaker is a problem…
Because this is the support forum for the SaySomethinginWelsh course, and most of our learners are quite happy with their results with us…
We’re quite happy for other Welsh tutors to offer their services on here (although we always think it’s a nice touch when people ask for permission before posting commercial offerings) - one of our favourites is @mererid - she came in a little ‘salesy’, but after feedback, she became a very valuable and welcome member of the community.
You might find her first thread interesting: