It is simply because no one understands the lyrics, which is a shame.
Most music in Eurovision does not actually identify it's country, nor it's traditions or culture, it is just another English sang song.
I mean look at "Loreen - Euphoria", what have you learnt about Sweden?
I find that Eurovision has a much bigger mission than just being a singing contest, we all could learn a little more about each country, get us closer to one another, understand us better so we can have an Europe together.
Maybe today we would have a more cohesive Europe where everyone feels like they are truly part of it.
Instead, we just butcher it, and discourage self-identity. It is simply so sad.