"Do you want to sleep?"

Translation: Dych chi eisiau cysgu?

[adriennesls]

Could you also rearrange this? so it would be: "eisiau cysgu dych chi?"

[tinmur]

Want sleep do you??

[CerisTewar]

Is wyt ti'n isio cysgu wrong?

[mizinamo]

Is wyt ti'n isio cysgu wrong?

Yes. No yn before eisiau, regardless of how you spell or pronounce it.