None of my 3 kids walked until 14-15 months, so that's fine. I wouldn't be worried about the lack of words at 13 months either. Like another PP mentioned, you may not realize he has some words (grandparents had to point out to me that #2 actually was saying a few words at 13 months that up to that point I had thought were gibberish).

my son started walking at 14 months, talking around 18 months. He is 5 now, bilingual, with amazing language skills.