Spell check in Writer is not checking according set language

Spell check in Writer is not checking according set language

Hi,

I am trying to work on a dutch document, set the language checker to "Nederlands" (it is Ducth for saying Dutch ;) ). But still the whole doucment shows up RED. 

Followed the instruction as described:
https://www.zoho.com.cn/docs/writer/help/document-proofing.html 
Didn;t help. Even closing the Tab and reopen again, didn't help. 
The status bar down left corner is saying "Nederlands" . But if i click on one of the red marked words I only get English suggestions poped up.