I have NO German language. None. 
My mother-in-law on the other hand...... Of course it was my mother-in-law!!
It looks like her mother was a first generation German/Australian. Both of her parents, and 3/4 of her grandparents were born in Gemany (well, Prussia actually) and died in Victoria, Australia. 
I have naturalization certificates, wedding certificates, and death certificates, (all Australian), but what I would really like to find is information about HOW/WHEN they immigrated to Australia. They do not seem to appear in the immigration lists that I have access to. 
Any suggestions please?