Walking and Talking L's
Solution 1:
I can't speak for your one individual, but in general yes, it is regional. Some speakers of Southern American English will appear to pronounce the /l/ in the words "walk" and "talk". It has also been reported from speakers of African American Vernacular English, a related dialect.
SAE is spoken across the south-eastern quarter of the continental United States. AAVE is spoken in urban areas across the country, and is often found in popular media, particularly hip-hop, blues, and other American music.