The Lake of the Hirsel or Hirsel Lake is an artificial body of water near Coldstream and the River Tweed on the Scottish Border. Contrary to popular belief, the Lake of Menteith is not the sole "lake" in Scotland, but the only natural one. Coldstream is a burgh in the Scottish Borders. ... The River Tweed at Abbotsford, near Melrose The River Tweed at Coldstream The River Tweed (156 kilometres or 97 miles long) flows primarily through the Borders region of Scotland. ... The Lake of Menteith, or, until the last century, the Loch of Menteith, is the only natural or large body of water in Scotland that is referred to as a lake (although there are two small artificial bodies of water known as lakes). ...
in origin and is applied to most lakes in Scotland and to many sea inlets in the west and north of Scotland.
It is also applied to lakes and bays in Ireland.
Scotland has only one natural water body actually called a lake, the Lake of Menteith, an Anglicisation of the Scots Laich o Menteith meaning a "low-lying bit of land in Menteith", and applied to the loch there because of the similarity of the sounds of the words laich and lake.