BI Launchpad Language not changing to English

I am trying to change the BI launch pad language to English by setting the BI launch pad preferences.

Even though I have set everything to English, it still appears as german in launch pad.

We are using SAP as a source to create BO analysis reports.

Hence we checked the SAP authentication in CMC and found the default to be set to DU instead of EN in language.

However even after changing to EN nothing happened, and all the analysis reports still appearing in German,

Any pointers would be really helpful.