No, it does not. To assume that the same consonants as English will be used in another language seems to me rather bland. First and foremost, what sounds are available for use should be clarified.
After that, creating random roots is not the problem, nor even assigning them words and definitions. It is the other, more difficult aspects of language, such as sentence structure, which are very important. Also, you have to formalize things such as plural rules, different verb tenses, how one specifies what a very applies to, the possible addition of masculinity/femininity in nouns, etc.
Anyways, first and foremost a decision has to be made as to what sounds are to be used for each proto-language. I will have a suggestion up tomorrow. I have a set completed today, but I am about to go to sleep, so I'll put it up in the morning for review. Hopefully it makes some sort of sense when I do.
EDIT: Aren't Josef and Jalapeno in different cradles? It makes little sense to use the same roots for both languages, unless I am completely misunderstanding Jalapeno's post, which is very possible.