Go source code files should have the .go extension. The source code of Go files is encoded in UTF-8 Unicode. This means that you can use any Unicode characters in your code, like hardcoding Japanese characters in a string.
Semicolons are optional at the end of a line and typically omitted. Semicolons are only required when separating multiple statements or expressions on a single line.
Go does have a code formatting standard which can easily be adhered to by running go fmt on source code files. The code formatting should be followed, but it is not strictly enforced by the compiler the way Python requires exact formatting to execute properly.