Verb conjugation of "affirmer" in French

The script I am writing will shuffle the 1.5 million words and it will detect if too many words are from the same user. And if an entry is too long, I will skip it and rely on the sentences that we can hopefully make up together.
Vocabulix includes a vocabulary builder for many languages, Spanish and German are just the ones that have the predefined sections. Generally speaking you can invent your own set of expressions and drill them on the speed train.
Have you ever visited the U.S. before and if so, where have you been in the U.S.? I've been travelling in California, it was very amazing. We have traveled by car. Here are my corrections.