Thoughts on how to do this?

[Umarian]

So I am trying to code a feat and trying to think of a way to do it.

The feat let's you choose a number of languages equal to your INT modifier. You do not speak these languages, but instead have a chance to make an INT check to understand someone that speaks one of those languages.

So the question is, what are some thoughts on how to do this? I think it will come down to the player using their notes, but wanted to weigh some other options. I don't want to add it to their languages known, because they don't know it. Also, it I let it be user chosen field, the number of choices would have to be variable depending on the INT mod.

Anyone think of a way to do this?