As with any human or other-than-human animal, all behaviors are a combination of genetic makeup and environmental influence. Communication is included in this statement, which means that canine communication and body language is a mix of inherent and learned behavioral displays. It’s not uncommon to find a dog who doesn’t “speak dog” well, and this is likely due to a lack of proper socialization – aka this dog hasn’t had enough interaction with his own kind in order to learn how to communicate properly (environment). This doesn’t mean that they can’t ever learn though. And many of the calming/negotiation techniques that dogs use are inherently obvious because they’re options that, physically, dogs can easily, and often naturally, do. (ie tongue flicks, look aways, slow blinks) Teaching dogs calming/negotiation signals is certainly an option and can go a long way in enabling that dog to build relationships and avoid unnecessary fights with other dogs. Dog fights can be caused by a simple miscommunication due to one or both dogs with poor or underdeveloped communication skills.
Domesticated dogs are not born with their doggie communication skills in tact, these skills have to be learned, just like we humans require teaching and experience to hone our own communicative abilities (both verbal and physical).