XML: Chinese translation
remove white space at the end of both xml files
yaml: Chinese translation
fix encoding issue
Start of initial translation: Go -> de-de.
Translation of next 2 functions.
Translated function: learnTypes()
Translated function: learnMemory()
Translated function: learnControlFlow()
Translated function: learnInterfaces()
Translated function: learnErrorHandling()
Translated function: learnConcurrency()
Added rest of translation.
[yaml/cn]: add last translation
[go/ko-kr] add missing translations