Either they physically can't, having something wrong with their vocal cords or something, or they can talk fine, just choose not to. This is called being an elective mute. Elective mutes may be elective mutes for reasons such as depression. If that is the case, they are best left be.
Yes, all people speak unless that person is mute. (Or does not have the ability to speak at all)
well, first of all spanish some speak Brazilian and a lot of spanish people speak English!
All people speak differently.
The Cuban people that live in Cuba all speak spanish.
No, some speak English and some speak Yupick.
No Mexican, Puerto Ricans, Colombians; alot of Nationalitys speak spanish
We all speak different and pronounce different. Some People might speak the same but face it we are different. Byee Lol
There are communities of Germans in Italy. Some of them are retired and some of them work there.
Approximately 1.5 billion people worldwide do not speak English at all.
There are several reasons for this behavior. We all as individuals have certain things the we feel passionate about. For many people prejudice is intolerable so they speak up. Also, some people find it difficult to speak up, they need approval and so they go with the flow.
what are you talking about? The correct definition of dumb is unable to speak or can hardly speak at all. this question doesn't make sense unless you mean how stupid do people get and in that case, some are VERY stupid.
It is all the same English where ever you go, the difference is the pronunciation and dialects, eg: Canada is vastly different from Australia and New Zealand, then the way the Scots speak English is different again from the people in London England. The USA has sthe most differences in every state there is their own accent, (in some states you may even have a hard time understanding them), but it is all English!