[App/IO] Use English in comments.

.codespellrc

 [codespell]
-skip = ./.git,./Tests/Data,./ThirdParty,*.yml,*.bib,./web/content/imprint.md,./GeoLib/IO/XmlIO/OpenGeoSysSTN.xsd,./Applications/FileIO/Legacy/OGSIOVer4.cpp
+skip = ./.git,./Tests/Data,./ThirdParty,*.yml,*.bib,./web/content/imprint.md,./GeoLib/IO/XmlIO/OpenGeoSysSTN.xsd
 ignore-words-list = Theis,nd,theis,strat
 exclude-file = .codespellexclude

Applications/FileIO/Legacy/OGSIOVer4.cpp

@@ -169,7 +169,7 @@ std::string readPolyline(std::istream &in,
     auto* ply(new GeoLib::Polyline(pnt_vec));
     std::size_t type = 2; // need an initial value
 
-    // Schleife ueber alle Phasen bzw. Komponenten
+    // Loop over all phases or components
     do {
         in >> line;
         if (line.find("$ID") != std::string::npos)