documentclass[preview,varwidth]{standalone}

usepackage{graphicx}
usepackage{fontspec}

newfontfamily{pIqaD}{pIqaD}

newcommandKlingontext[1]{{pIqaDrelax{#1}}}

newcommandKlingonA{Klingontext{symbol{"F8D0}}}
newcommandKlingonB{Klingontext{symbol{"F8D1}}}
newcommandKlingonCH{Klingontext{symbol{"F8D2}}}
newcommandKlingonD{Klingontext{symbol{"F8D3}}}
newcommandKlingonE{Klingontext{symbol{"F8D4}}}
newcommandKlingonGH{Klingontext{symbol{"F8D5}}}
newcommandKlingonH{Klingontext{symbol{"F8D6}}}
newcommandKlingonI{Klingontext{symbol{"F8D7}}}
newcommandKlingonJ{Klingontext{symbol{"F8D8}}}
newcommandKlingonL{Klingontext{symbol{"F8D9}}}
newcommandKlingonM{Klingontext{symbol{"F8DA}}}
newcommandKlingonN{Klingontext{symbol{"F8DB}}}
newcommandKlingonNG{Klingontext{symbol{"F8DC}}}
newcommandKlingonO{Klingontext{symbol{"F8DD}}}
newcommandKlingonP{Klingontext{symbol{"F8DE}}}
newcommandKlingonQ{Klingontext{symbol{"F8DF}}}
newcommandKlingonQH{Klingontext{symbol{"F8E0}}}
newcommandKlingonR{Klingontext{symbol{"F8E1}}}
newcommandKlingonS{Klingontext{symbol{"F8E2}}}
newcommandKlingonT{Klingontext{symbol{"F8E3}}}
newcommandKlingonTLH{Klingontext{symbol{"F8E4}}}
newcommandKlingonU{Klingontext{symbol{"F8E5}}}
newcommandKlingonV{Klingontext{symbol{"F8E6}}}
newcommandKlingonW{Klingontext{symbol{"F8E7}}}
newcommandKlingonY{Klingontext{symbol{"F8E8}}}
newcommandKlingonGlott{Klingontext{symbol{"F8E9}}}
newcommandKlingonZero{Klingontext{symbol{"F8F0}}}
newcommandKlingonOne{Klingontext{symbol{"F8F1}}}
newcommandKlingonTwo{Klingontext{symbol{"F8F2}}}
newcommandKlingonThree{Klingontext{symbol{"F8F3}}}
newcommandKlingonFour{Klingontext{symbol{"F8F4}}}
newcommandKlingonFive{Klingontext{symbol{"F8F5}}}
newcommandKlingonSix{Klingontext{symbol{"F8F6}}}
newcommandKlingonSeven{Klingontext{symbol{"F8F7}}}
newcommandKlingonEight{Klingontext{symbol{"F8F8}}}
newcommandKlingonNine{Klingontext{symbol{"F8F9}}}
newcommandKlingonComma{Klingontext{symbol{"F8FD}}}
newcommandKlingonStop{Klingontext{symbol{"F8FE}}}
newcommandKlingonMumm{Klingontext{symbol{"F8FF}}}

newcommandtlhIngebrgh{KlingonTLHKlingonLKlingonIKlingonNGKlingonEKlingonNKlingonBKlingonEKlingonRKlingonGH}
newlength{nameWidth}
settowidth{nameWidth}{tlhIngebrgh}
newlength{symWidth}
settowidth{symWidth}{KlingonMumm}

makeatletter
newcommandscalefactor{strip@ptdimexpr 1pt *
                        numexprnameWidthrelax /
                        numexprsymWidthrelaxrelax}
makeatother

begin{document}

makebox[nameWidth][c]{scalebox{scalefactor}{KlingonMumm}} \
tlhIngebrgh

end{document}