Technically, humans are not a type of alien, since the word 'alien' pertains to 'foreign', and humans are not foreign. However, if there is another intelligent species that is out in space, humans would be alien to them. It all depends on your perspective.
The synonym of "foreign" is "alien" or "external."
Exotic; foreign
Foreign, alien, outsider Ancestors
There is no such language as "alien". It's like wanting to know how to speak "foreign".
* alien * expatriate * nonnative * offshore * overseas
Alien, or foreign.
Foreign communication is communication with alien country in alien language as a foreign language although the career option could be in mass media in the print media, audio /visual media,IT sector and engineering in communication technology.
strange, alien, exotic, remote, imported, immigrant
The opposite of the word "native" is "foreign" or "alien."
alien, exotic, unknown, strange, imported, remote, unfamiliar
Alien and foreign both are opposites of indigenous.