When talking about grouping and shortcuts we’re actually talking about the keyword field.
This may be a left over in the docs. This text module part is a bit older by now.
Reworking does take quite some time.
Here’s an example.
If you use the keyword “EN” for your language you can actually filter for all text modules that contain EN (heads up, it also looks within the title / name!) which allows you to see less modules.
You could also use the name for that. Like wuscherpfennig suggested.