You must make a polyglot that outputs its source code in one language and its source code backward in another. Unlike the normal rules, you are allowed to read the current file or use a builtin to get the source code of your submission and reverse that in one language. Your source code cannot be a palindrome.
For example, if your source code is
abcxyz, it must output
abcxyz in one language and
zyxcba in another. If your code is
abcxyzyxbca, it's invalid because it's a palindrome.