title: Lyx change language with find replace
body: <p>I have written a lot of text in greek with selected language "greek" in lyx 2.1 . The problem is that there are words and characters in english in there and when i output to pdf with pdflatex they are transformed into the matching greek characters. I suppose i need to change the language of every english word in there to english, but that sounds very repetitive... I am wondering if i can use regex to match english characters and change their language with find replace somehow. I have successfuly managed to match english characters with this capture group <code>\regexp{([\backslash x00-\backslash x7F]+)\endregexp{}}</code> but i dont know what to replace it with. Any ideas?</p>
  
  <p>PS: does lyx regex even have backreferences or are capture groups just there for no reason?</p>