Eurosport (English) have a guy who comes on during a quiet part of each stage to talk about the wine/cheese/cuisine of the region and give a recipe for a local dish. They also have former pro-rider Juan Antonio Fletcha riding his bike up the day's main climb describing what it's like and doing rider interviews, especially in Spanish. Also on the team is the former pro-cyclist and team manager Brian Smith (Scottish accent) and cycling legend Sean Kelly (Irish accent).
None of the above may suit an American audience however.