Why go
Regional names and languages help distinguish places that can look close together on a map. West Frisian belongs to Friesland, Twents to Twente and Drents to Drenthe; Limburgish is associated with the south-eastern province of Limburg. Recognising these differences gives regional identity more substance than treating every local language as interchangeable with Dutch.
The full story
West Frisian has an official role alongside Dutch in Friesland, including government correspondence. Its place in regional education reinforces a linguistic identity that extends beyond informal conversation. In the north and east, Low Saxon is a group of regional varieties rather than a single uniform local speech. Twents and Drents take their names from particular regions. The Caribbean islands have a different language setting. English is widely spoken on Saba and Sint Eustatius, while Papiamento has a formal role on Bonaire. A language overview of the European mainland therefore does not describe the whole country. Foreign-language learning also has a long place in Dutch education, with English taught in secondary schools. That background helps explain the presence of English, but does not mean every conversation or local text will use it. Dutch and the regional languages remain part of the places visitors encounter.