Iechyd Da!

Isleworth isn't known for its Welsh speaking community, so I don't know why this sign is hanging in the garden of our local pub (which isn't " The Prince of Wales"). But hey! All welcome!
I hope this isn't another example of English cultural imperialism, however. Do any Welsh viewers think the sign should be repatriated? I could ask the landlord to meet you at a services on the M4...

(Hope Google's translation site hasn't let me down here)