"Dw i'n hoffi'r Unol Daleithiau."
Translation:I like the United States.
No. There are a few adjectives which usually precede the noun, and this happens to be one of them.
This is an unrealistic sentence as no Briton in their right mind has ever said this.
Daleithiau means states? Is it also synonymous with 'country' in the same way the English word for 'state' can be?
The root word here is talaith (b) (taleithiau), a state or province of some countries.
In yr Unol Daleithiau the plural taleithiau is mutated because it is preceded by the adjective unol, which, unusually for a Welsh adjective, precedes the noun it is describes.