Flemish Coast lies in Flanders, so Dutch is the official language of the area. The local dialect is known as West Flemish and differs from Dutch so strongly, that it can be difficult understandable by people from other parts of Flanders and Holland. However now, only older people speak only West Flemish dialect, while younger generation tends to speak standard Dutch.
Because there are a lot of tourists from Wallonia (French-speaking part of Belgium), French is much better understood on the Flemish Coast than in other parts of Flanders. The majoraty of local people can speak English quite well too.
The best way to get around is the [http://http://www.dekusttram.be/ Coastal Tram] (Dutch: Kusttram). Coastal Tram is a tram (streetcar) route that runs along the whole Flemish coast. The route is 67 km long. It is operated by the Flemish public transport company De Lijn [http://www.delijn.be]. The ride inside one zone costs ?1,20 or ?1,50, depending on whether you buy the ticket on the tram or in advance in kiosk or ticket machine. Biggest tram stations have kiosk where you can purchase the ticket.