Welsh

Welsh (Cymraeg in Welsh) is a Celtic language and is spoken in Wales and Patagonia (Argentina). The Welsh alphabet is: a, b, c, ch, d, dd, e, f, ff, g, ng, h, i, l, ll, m, n, o, p, ph, r, rh, s, t, th, u, w, y, with a close correspondence between the letters and spoken sounds, particularly in the north of Wales. Welsh contains a lateral fricative as a component of typical speech, that in English would be classified as a lateral lisp, or an error sound requiring speech intervention.

**An update from Martin Ball: "Welsh is not the only language to have lateral fricatives as phonemes. For example Zulu and Xhosa have both voiced and voiceless, they occur in many native American languages (e.g., Navajo), with some 30+ languages listed for the voiceless one alone on Wikipedia. There's also lateral fricatives at other places of articulation (retroflex, palatal)."