Process a text, Spanish (Argentina) or English, always returning Spanish

I am trying to make ChatGPT3 respect my initial text, but I can’t. Do you have any ideas?
This is the prompt:
Please correct the grammar and syntax of the following text. If the text is in Spanish, use the Argentine dialect. Ensure the response is in the exact same language as the provided text. Make the fewest changes possible while preserving its original style and tone. Here’s the text to be corrected:

Hey, this is an example

and the response is:
Hey, este es un ejemplo.