Changing the URL to load a different language and report back which ones are successful

I'm looking to change the last 5 digits of this URL "localhost:2235/Movies/Index?lang=fr-fr".

So for the language section of the URL, I'm looking for it to cycle through my 39 language codes in my database and load that page each time for a new language code.

I'm not 100% sure which type of test to use whether it's Unit, Web Performance etc... I'm looking to catch any errors before I push my webpage live. Whether a page loads the language or defaults to the error page