Not applicable. There are no Speak Language checks to fail.
The Speak Language skill doesn’t work like other skills. Languages work as follows.
- You start at 1st level knowing one or two languages (based on your race), plus an additional number of languages equal to your starting Intelligence bonus.
- You can purchase Speak Language just like any other skill, but instead of buying a rank in it, you choose a new language that you can speak.
- You don’t make Speak Language checks. You either know a language or you don’t.
- A literate character (anyone but a barbarian who has not spent skill points to become literate) can read and write any language she speaks. Each language has an alphabet, though sometimes several spoken languages share a single alphabet.