I think it's a great shame when a minority language which has a rich culture and history behind it is allowed to fade away. Manx2.com definitely don't make announcements in Gaelic ..... it's heavily accented (Czech) English, but very clear. The recorded videos are in perfect English.
Iberia used to make announcements (recorded) on domestic flights in regional dialects such as Mallorquin, Valenciano, Bable, as well as the official regional languages of Euskera, Catalan, and Gallego. I don't know if they still do but with the decline in standards I doubt it.