The term is also applied to people whole only one parent is Kazakh.
[1] The word Shala Kazakh also has a pejorative meaning in Kazakhstan.
The actual translation for "shala" or "chala" is half.
Thus, the whole meaning is "half Kazakh", i.e. the person who does not know and does not like his/her native language.
The word is considered to be derogatory, shameful term for Kazakhs.