"Dw i'n hoffi Caerfyrddin."

Translation: I like Carmarthen.

[Strobro3]

These place names mean nothing to me because I'm Canadian.

[Heysoos1]

Which means...

[mizinamo]

...that the speaker is rather fond of the town Carmarthen in south-west Wales.

[Heysoos1]

I meant the place-name, xD.

[mizinamo]

possibly, "Fort of Merlin":

Wikipedia says that the identification of Myrddin with Merlin is not certain.

[MTegwyn]

Is there a rule when you are "supposed to translate" as opposed to just using the Welsh name?

[areddragon]

Use the Welsh name if you're talking in Welsh, and the English name if talking in English :)