My MacBook Air shows only the custom dictionary when I use spell check

Hi writer82,

Welcome to Apple Support Communities. You can adjust the source for the dictionary on your Mac by following these steps:

Customize Dictionary sources

* In the Dictionary app  on your Mac, choose Dictionary > Settings. You can select and reorder sources, such as Spanish or Korean dictionaries. You can set options for some sources, such as how to display pronunciations or which language of Wikipedia to search. The sources you select here determine the sources shown in Dictionary and when you look up words.

This information is outlined here and may help: Dictionary User Guide for Mac - Apple Support

We look forward to hearing back from you with an update.

Kind regards.

writer82 wrote:

My new MacBook Air (Ventura 13.4) shows only custom dictionary when I use spell check.

Where exactly do you see this? Are you perhaps talking about MS Word, as shown in the picture below?

For Word problems, a good forum to ask in is

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_word-msoffice_OfH-mso_OPMac?sort=LastReplyDate&dir=Desc&tab=All&status=all&mod=&modAge=&advFil=&postedAfter=&postedBefore=&threadType=all&isFilterExpanded=true&page=1

Info on Apple's spellcheck is at

Check spelling and grammar on Mac - Apple Support