My ancestors are from at least 6 different countries and many of them spoke languages I can't even really speak the modern equivalents of.
I think as long as I remain mute people will just think I'm a simpleton or the local equivalent (since I don't understand them and don't know how to work 16th century tech).
In 500 years from now, presumably they will know that time travel has been invented so they will be more likely to suspect it.