I have powerpoint presentation in English, and my Windows system uses Czech keyboard, I'm used to it. I already set all my language settings inside powerpoint to english, as seen here: , I already set the language of all texts inside the presentation by running macro in https://superuser.com/a/680281/998915, but when I type new text, it uses Czech as proofing language instead of English for it, which drives me nuts. Is there any way to force the proofing language per document even for current and new text?
Check if you are not using a non-engliah font, don't try to use time new roman or calibri. Download an Engliah specified font and then type by times new roman, then select the text and choose the downloaded font.
If the method above didn't work, make English your first keyboard if using windows 7.