"It's too cloudy."

Translation: Mae hi'n rhy gymylog.

[Lundgren8]

Does rhy cause soft mutation or can it also be cymylog?

[areddragon]

Yep, according to this BBC article, then rhy causes a soft mutation in any adjectives following it. Gymylog also feels right, in my opinion (it flows more nicely off your tongue).

[Lundgren8]

Thanks! Although that implies that cymylog is incorrect, even though you answered ’yes’. Gymylog is the mutated version, not cymylog.

[areddragon]

Ah sorry, my bad - I meant yep, it's mutated, you're right! :P

Sorry!