Poortvliet is a village in the Dutch province of Zeeland. It is a part of the municipality of Tholen and lies about 12 km northwest of Bergen op Zoom.

Zeelandic is a group of language varieties spoken in the southwestern parts of the Netherlands. It is currently considered a Low Franconian dialect of Dutch, but there have been movements to promote the status of Zeelandic from a dialect of Dutch to a separate regional language, which have been denied by the Dutch Ministry of Internal Affairs. More specifically, it is spoken in the southernmost part of South Holland (Goeree-Overflakkee) and large parts of the province of Zeeland, with the notable exception of eastern Zeelandic Flanders.