Does one of their many meanings make it okay to use them as a reference in a love song?
Yes!
The girl is telling her man to save her from these aliens (in other words, people who feel "alien" to them not actual aliens mother****er) because these people don't speak the "language" that comes naturally to them (in other words, these people doesn't understand their love) - is it that hard to understand girl?
Save me from the aliens who don't speak our language that comes naturally