"I do not like that at all."
Translation:Cha toil leam sin idir.
In the tips for the first lesson, they say that some folks use toigh and some toil, and they chose to teach toil because it's more common.
The tips don't show up in the app -- they're only visible from the web interface -- but you can bring up the web interface in your phone's browser: https://duolingo.com
So far, they're the best I've seen for any Duolingo course: strategic, just enough grammar information, funny, and with a table of the grammar covered in the lesson. I've been writing notes from them each time I start a lesson, and copying the vocabulary list.