I LOVE WRITING "INFORMS"
You are going to tell me that this does not happen and that I am making it up (inventando...oh yes, I know you like those phrasal verbs!). I am sorry to tell you that I have heard this many times. Again, I don't really think that it is a conscious mistake. I think that the word "informes" is programmed into your minds and the moment that you need to pull out the translation for "informes" your brain scans around and says: "not really sure about the translation, so I will use "informs"!
I completely understand...believe me. I would even recommend this type of "Russian roulette language guessing" because it makes speaking a foreign language more fun and a bit like a game!
The only thing to remember here is that when you crash and burn, always learn from your mistakes and always use the word "reports" rather than "informs".
Hope that helps!
Soy el director de Daniel Smith + Partners. Tengo más de 15 años de experiencia enseñando inglés a españoles.