Query about converting application code for german region language

[Tanu@123]

I have Query about converting application code for german region language.

If I have large application code and I need to make it appropriate for Germany (Its crashing right now due linguistic difference).

Should I need to change each and every statement for its conversion ?

Please guide me for the further steps.

[high_flyer]

You might want to start here (http://doc.qt.io/qt-5/i18n-source-translation.html)