From having looked through a Tagalog reference grammar and a dictionary, I can say rather confidently that Tagalog is a language and not a creole. There are a huge number of other languages spoken in the Philippines. Having watched some Philippine comedies on TV, the amount of code switching between Tagalog and English might make it seem like a creole, but it isn't, and you see something similar happening with Indian language and English.

Ceci n'est pas un seing.