Luxembourg in the Eurovision Song Contest 1978

Luxembourg was represented at the Eurovision Song Contest 1978 with the song "Parlez-vous français ?", composed by Rolf Soja, with lyrics by Frank Dostal and Peter Zentner, and performed by Spanish duo Baccara. The Luxembourgish participating broadcaster, the Compagnie Luxembourgeoise de Télédiffusion (CLT), organised a public national final – rather than their usual method of internal selection – to select its entry for the contest.

Baccara were one of the most internationally famous acts ever to appear at Eurovision, being already known throughout Europe from two recent hugely successful singles, "Yes Sir, I Can Boogie" (which had spent a week at the top of the UK Singles Chart in late 1977) and "Sorry, I'm a Lady". Frank Dostal, who wrote the lyrics for "Parlez-vous français ?", had also penned the duo's previous recordings.