Sprog may refer to:
Sprogø is a small, protected Danish island, which is located in the Great Belt, the strait that separates the main islands of Funen and Zealand. It lies about halfway across the strait, 6.7 km from the Zealand shore and 8 km from the Funen shore.
Although sprog is modern Danish for speech, the island's name was originally recorded in the 12th century as Sproøe meaning scout's island, from the old Danish verb spro (to scout).
Today, the island forms part of the Great Belt fixed link, and is connected to Funen by a road and rail bridge, and to Zealand by both a road suspension bridge and twin rail tunnels. The island is crossed when using the link. During the construction, the island was drastically remodelled, with land reclamation increasing its area from 38 to 154 hectares.
There are remains of buildings on the original part of Sprogø from the beginning of the 12th century, a fortress built under king Valdemar the Great. During construction work, extensive archaeological investigations were undertaken, and among other findings it was revealed that the first inhabitants arrived more than 8,000 years ago.
Sprog is graphical tool to build Perl programs by plugging parts (called "gears" in Sprog terminology) together. Given the available gears are mostly for reading and processing data, this program can probably be classified as an ETL (Extract-Transform-Load) tool.