Same thing is true for words, there are words in my native portuguese that are dificult to tell from each other even in person, imagine by phone. If some one misunderstands a word and it's valid on a combination?
For example (in portuguese), Paca.Tatu.Cotia (Paca.Armadilo.Agouti in english) can be misheard as Maca.Tatu.Quati (Stretcher.Armadilo.Coati in english). What if both combinations are valid, but thousands of km away ?