Philippe Langlois (French pronunciation:[filiplɑ̃ɡlwa]) in Norman language: Ph'lippe Langliais (22 September 1817 – 19 June 1884) was a Norman language writer in Jèrriais. He wrote under the pen name of "Un Luorenchais, as well as "P.L.".
Langliais came from an old family of St Lawrence in Jersey. He studied in Caen and Paris and qualified in medicine in Dublin where he was received into the Royal College of Surgeons. A scholar and scientist, he was also Deputy of St Lawrence, Jurat of the Royal Court (elected 27 June 1876) and major and medical officer in the Royal Jersey Militia.