( From various grammars I have gathered that there is a ) vowel-copying rule in Welsh which changes words like ( aml, pobl, cefn ) into ( amal, pobol, cefen ) ... I have seen "llwdn" written "llwdwn", ( and heard "llyfyr" pronounced like "llyfir". This makes it look like the ) part of the rule that changes w to y is not triggered by adding in the new ( w, but that copying "y" does change the firt one. Are there really rules that determine what intrusive vowels get used? Since they depend on accent (or do I mean dialect?) the rules will have to vary too. Because the intrusive vowel is always unaccented it is sometime hard to tell, but I think that I always put a dark "y" in aml, not an "a"; also an "y" in "lleidr", whereas I would bet that someone from Bangor would put an obvious "a" in it, and someone from Corwen an "i" (except that I may have the Corwen and Bangor accents the wrong way around...). ( While I'm at it, does anyone have any idea what the plural of ) "cwmwlws" is? "cymylysau"? Maybe I can find out in the Geiriadur Termau. It's a modern Latin borrowing, and I pro'lly reckon to talk posh like, so I think "cwmwli" for a plural noun, and either "cwmwlws" or "cwmwli" if used as a plural adjective. ( PS: Dw i'n chwilio llyfrau yn y Gymraeg (does dim yn llyfrgell fy ysgol i ) ond clasuron). Oes rhywun sy'n gwybod cyfeiriad cyhoeddwr sy'n cyhoeddi ( lle+n gyfoes? Y ffordd hawasaf i gael gafael ar rychwant eang o lyfrau cyfoes fyddai cysylltu a'r Cyngor Llyfrau, sy'n dosbarthu'r mwyafrif o lyfrau Cymraeg y mwyafrif o gyhoeddwyr Cymru. Ar un tro roeddent hefyd yn cyhoeddi cylchgrawn misol, Llais Llyfrau, am gyhoeddiadau diweddar. Yn ol BT, dyma'u cyfeiriad: < > Cyngor Llyfrau Cymraeg Castell Brychan Dyfed, SY23 2JB Aberystwyth (0970) 624151 Hynny yw, +44 970 624151 i alw o dramor. g