Why are there different pronunciations of 复杂？ During a Chinese class, a student pronounced 复杂 as fu3za2, instead of the official pronunciation fu4za2. The Chinese teacher corrected the student but then mentioned many native speakers pronounce it as fu3za2 as well, particularly in the south or something like that.
Have any of you heard this different pronunciation and perhaps know the reasons behind why such a tonal difference exists? Is it, like the teacher said, just simply a case of south Chinese pronunciation? Or is it more complex than that?
多谢！
The reason is simply because it's 顺嘴(for better fluency/flow better).
It could be that we leverage it from old generations.  And then we have been corrected in school.
In practice, we know the correct pronunciation for it, but sometimes most of people still say fu3za2 occasionally because they already get used to it.
I don't think this only applies to the southern areas.  I also find it's been said by people from the north.