How can I permanently change the proofing language in 365 powerpoint?

Occasional Visitor

We have 3 windows installs, two desktops running windows 10 in virtual box and one laptop with only win-10 installed, all 3 have an installed language of English (United States) are running office 365 family.  All 3 exhibit the proofing problem. 

In office 365 family I have added German (and set it as preferred) in the office authoring languages and proofing popup window from View>Language. I have left the Office display language as match Microsoft windows [English] <preferred>.

In power-point>options>Language>office authoring languages and proofing I have German (Germany) <preferred> and the office display language is English.

In power-point>options>proofing>custom dictionaries, I don't have a German option so I have All languages>roamingcustom.dic (default) and CUSTOM.DIC selected.


When I open a new slide or project the notes and slide are apparently being proofed in German (i.e. there are no spelling error wriggly red lines under the text) and the “mark selected text as: ” setting (bottom left corner of the window) is set to German.


The problem is that whenever I try to edit slides and-or add notes the software auto reverts to English (united states) and starts auto correcting the spelling e.g. if I type “moderne” and then space, power-point removes the “e” leaving me with “modern”.


Any ideas what I have done wrong and-or missed?

1 Reply

Hello, @BB1--1. To change proofing language settings in Microsoft 365 PowerPoint, open the app and create a blank document. Hit File, options, choose Language and under the Choose Editing Languages menu, with the help of the drop-down menu, pick the language you need for grammar/spelling proofing.


Now hit Add. Save the changes and restart the app.


If you need several proofing languages, check this link.


This how-to article will be helpful in learning all the details of the language configuration in PowerPoint. By the way, Microsoft 365 administrators with the Enterprise license should be aware of how to keep organization data safe to recover from any unexpected system glitches or ransomware issues.