Setting logon language in CMC to Null - Displaying Design studion dashboard in multi language

Hello,

I am having difficulties in displaying design studio dashboard in Multiple language. the dashboard BEX query and customer components were initially designed in local language. I have now translated the BEX query to English and updated the custom components to English ( Copy of existing dashboard). My dashboard is still not translated despite changing my browser language to English, Product and local setting in CMS to English.

I read from Design studio document that the OLAP logon language in CMC overrides any backend system language.

I have tested the dashboard by making the logon language to English and the Dashboard gets translated to English.

This is not enough as I would like the dashboard to be translated based on the user logon settings in BW. In analysis for office, there is possibility to choose logon language and this has worked so far.

I couldn't find null value in the language option for null value in CMC. Is there a way to set the logon language to NULL in CMC ? 

Thanks,

Bhat