was convertIsoStringToLanguage(), use convertToLanguageTypeWithFallback()

Change-Id: Ic08b09824cffdc9b633ba13ec3050cc109f671cd

framework/source/services/substitutepathvars.cxx

@@ -1161,7 +1161,7 @@ void SubstitutePathVariables::SetPredefinedPathVariables( PredefinedPathVariable
     // Detect the language type of the current office
     aPreDefPathVariables.m_eLanguageType = LANGUAGE_ENGLISH_US;
     OUString aLocaleStr( utl::ConfigManager::getLocale() );
-    aPreDefPathVariables.m_eLanguageType = LanguageTag::convertToLanguageType( aLocaleStr );
+    aPreDefPathVariables.m_eLanguageType = LanguageTag::convertToLanguageTypeWithFallback( aLocaleStr );
     // We used to have an else branch here with a LOG_ERROR, but that
     // always fired in some unit tests when this code was built with
     // debug=t, so it seems fairly pointless, especially as