In the language customizations (/admin/tool/customlang/edit.php) you can filter language elements according to different elements.
The list of components is sorted alphabetically. First by component category and then by file name.
The list of components can be quite long and/or is already quite long by default.

It would be good if the list of components could be filtered so that the selection is limited and you have to scroll less to find a specific file if the line jump via the letter input on the keyboard does not lead to the correct result.

(For example, you could filter by component category using the selection box.)
In this context, I would find it good / better if you could restrict the list by entering text. When entering text, a match of the file names should be checked. The filtered files and their categories should be visible in the result.