Thanks for the link.
The problem I have is trying to get C2 to pronounce welsh place names - I realise it stands little chance just going off the spelling but I was hoping I could break the words down into individual sounds and stick them into the google TTS engine (planning on running on an android device because that is what my friend already has). Basically I think it is not possible and I am now looking at Nuances TTS for welsh off google play store - I just don't know what the TTS engine will cost when it comes out of beta and I don't want to give him something that in 6 months needs an update costing £ ( who knows )....
On the bright side the welsh TTS appears to work well.
Anyway, thanks again for the link.