InDesign spelling default language

Hi there,

I have an essential InDesign problem, which I cannot fix. Tryied google-ways and YouTube, but nowhere my specific problem is solved.

I have my complete iMac on English language although I produce most times German products. Now I tried to set up the spelling / dictionary options in InDesign to German 2006 because that's what I neeed 90% of my work.

System: Mac OSX

InDesign CC 2014

So I went through the preferences pane and looked up the dictionary's menu. There I changed from US to German 2006.

But the problem is every time I create a new text field within InDesign-documents, they are default set to Englisch:USA instead of German: 2006. How can I define German:2006 as default text field dictionary and spelling check-language?

Hope you can help me with this problem.

Thanks.

Regards,

Florian