Another No Worries VoteI agree that it's nothing to worry about. Kids vary widely with regard to language development, and 10 months is really young...
Our oldest developed very quickly with regard to communication. We got gestures around 7 months, and although I refused to give her credit at the time, we were definitely getting words between 8 and 9 months. The first time I was sure she understood something we said she was 5 months old.
Our second DD was an entirely unremarkable baby, and then her language exploded out of the blue around 14 months. We had nothing before a year, and complete sentences by 17 months. At 2 years she tested well beyond age 3 for language development, and by 3 years she was reading. But again, we saw nothing at all before 12 or 13 months.
DS is 15 months and only has about a half a dozen words. He was slightly later than a year with gestures. He's very expressive, and communicates well even though he would have scored behind on a developmental assessment for language at 12 months, and he'd barely get a normal right now.
And I know plenty of kids who didn't say anything until they were 2 and you can't tell at all now that they're 5 or 7.