Checkbox subscription issue on Form

Hi, I’m having an issue with a form I created. It includes a checkbox where users can choose to receive my newsletter in one or both of two languages.

However, when someone selects only one language, they are automatically subscribed to both.

Why is this happening, and how can I fix it? Thank you!

This is really important for me to solve, I’m afraid if I don’t find a solution I will have to find another suitable platform that doesn’t have this issue. :confused: