Made custom package language independent

Signed-off-by: Jim Martens <github@2martens.de>

masterthesis.sty

@@ -92,9 +92,9 @@
 % simplify quoting
 \usepackage{csquotes}
 
-% support both german and english
-\usepackage[ngerman,english]{babel}
-\selectlanguage{english}
+% support both german and british english
+\usepackage[ngerman,english,british]{babel}
+\usepackage{iflang}
 
 \KOMAoption{toc}{bibliography, index, listof}
 
@@ -139,7 +139,7 @@
             \vspace*{2cm}\\
             {\LARGE \textbf{\@title}}
             \vspace*{2cm}\\
-            vorgelegt von
+            \IfLanguageName{british}{submitted by}{vorgelegt von}
             \vspace*{0.4cm}\\
             \@author
         \end{center}
@@ -151,11 +151,11 @@
         \if@writeprof
             \professor \vspace*{0.4cm} \\
         \else\fi
-        Studiengang: \studiengang \vspace*{0.4cm} \\
-        Matrikelnummer: \matrikelnummer \vspace*{0.8cm} \\
+        \IfLanguageName{british}{Course of studies}{Studiengang}: \studiengang \vspace*{0.4cm} \\
+        \IfLanguageName{british}{Matriculation Number}{Matrikelnummer}: \matrikelnummer \vspace*{0.8cm} \\
         \if@expose\else
-        Erstgutachter: \firstReviewer \vspace*{0.4cm} \\
-        Zweitgutachter: \secondReviewer
+        \IfLanguageName{british}{Supervisor}{Erstgutachter}: \firstReviewer \vspace*{0.4cm} \\
+        \IfLanguageName{british}{Co-Supervisor}{Zweitgutachter}: \secondReviewer
         \fi
     \end{titlepage}
     \restoregeometry
@@ -186,6 +186,7 @@
     \printindex
 
     \clearpage
+    \selectlanguage{ngerman}
     \input{declaration.tex}
 
     \if@library