documentclass[12pt,oneside,a4paper,openright]{report}
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}
usepackage[sc]{mathpazo}
usepackage[utf8]{inputenc}
usepackage[danish, english]{babel}
usepackage{xcolor}
usepackage{graphicx}

% Colors for Code
definecolor{grayC}{RGB}{250,250,250}
definecolor{Dgray}{RGB}{200,200,200}
definecolor{bluekeywords}{rgb}{0,0,1}
definecolor{greencomments}{rgb}{0,0.5,0}
definecolor{redstrings}{rgb}{0.64,0.08,0.08}
definecolor{xmlcomments}{rgb}{0.5,0.5,0.5}
definecolor{types}{rgb}{0.17,0.57,0.68}

usepackage{listings}

lstset{
  literate= {Ø}{{O}}1 {Æ}{{AE}}1 {Å}{{AA}}1
}

lstdefinelanguage{BABs} {
    alsoletter={O,AE,AA},
    morekeywords={
        HVIS,
        GØR,
        FÆRDIG,
        ER,
        IKKE,
        OG,
        ELLER,
        GENTAG,
        OPDATER,
        TABEL,
        RÆKKE,
        VIS,
        INDLÆS,
        SANDHEDSVÆRDI,
        TEKST,
        DECIMALTAL,
        HELTAL,
        SAND,
        FALSK
  },
  sensitive = false, % No case sensitivity of keywords
  morecomment = [s]{#}{#},   % Comment with start and end
  morestring = [b]" % Strings are enclosed with "
}

% Some additional settings for BABs
lstset{language=BABs,
  backgroundcolor=color{grayC},
  basicstyle=ttfamilysmall,
  breakatwhitespace=false,
  breaklines=true,
  commentstyle=color{greencomments},
  deletekeywords={...},
  escapeinside={(*@}{@*)},
  extendedchars=true,
  frame=single,
  keepspaces=true,
  keywordstyle=color{bluekeywords},
  numbers=left,
  numbersep=5pt,
  numberstyle=tinycolor{black},
  rulecolor=color{Dgray},
  showspaces=false,
  showstringspaces=false,
  showtabs=false,
  stepnumber=1,
  stringstyle=color{redstrings},
  tabsize=2
}

begin{document}

This is a test to show that lstinline[language=BABs]|GØR{<Stmts>}| and lstinline[language=BABs]{FÆRDIG} are not properly highlighted, however lstinline[language=BABs]{HVIS(<BoolExpr>)} is.

end{document}