My DD age 4.5 is a chatterbox like most girls her age, but still pronounces the letter "L" as a "Y" e.g. "I love you" is pronounced "I yuv you". She's always done this and I've never worried about it, assuming that at some point she'll grow out of it and will start to pronounce her "L"s properly.
She's not showing any sign of doing so though and I was wondering whether I ought to start gently encouraging her? I've heard that there's a window for tackling speech difficulties and if a child goes past a certain age, they can become set but I've no idea if that's true or what types of issues that refers to. Could do with some advice? Thanks