I’m mainly talking about conversations that are wired (like those use by law enforcement) when an undercover agent is wearing a wire. Of course, those conversations are recorded but can languages alone obfuscate the nuance of the spoken dialog since each language is different?
Again, not talking about “Spanish to English” level translation where it’s straight forward, rather it’s closer to “Japanese to English” where there are cultural differences, slang, honorifics and personification that can’t be translated properly without given context in advance.
It really depends who is recording you and their resources… Is it Tom down the street who you’re hiding the weekend get away from? Yeah, switching languages have a high likely hood of working. Is it interpol who you’re hiding a human trafficking operation from? Nope, no chance simply changing languages will work.