What you mistake for "broken language" is simply another dialect with its own codified grammar and vocabulary.Lo que tú confundes con "lenguaje chapurrado" es simplemente otro dialecto con su propia gramática y vocabulario codificados.
The people there were speaking some kind of broken language that I couldn't even understand.La gente de ahí hablaba alguna clase de lenguaje machucado que ni podía entender.