I want to add ‘,’ and ‘.’ in numbers to help players understand. Example: In game is shown “$8000000000”, this is difficult to understand, to it would be best “$8,000,000.000”. Any ideas?

You can try using the ToText / AsCurrency nodes (if Blueprint) or FText statics (if C++). Keep in mind that Blueprints can only handle int32 (max of ~2.7bil) or floats which might get inaccurate once you hit 8+ digits. If you use C++ you should be fine. Alternatively, if you operate on strings, yo…