Great idea - different users use different things more often, and having access from context menu makes the flow that much faster.

On top of that, would you please add a keyboard shortcut option?
I really do not want to keep having to grab the mouse! Make it the same way as you have done inside the "ctrl" key-press menu that appears after pasting content in a spreadsheet: You allow selecting the choice by pressing the highlighted key for the option...

E.g.: press Ctrl = opens the "paste" context menu, then, press "F" = selects the "formulae only" option

@Constantine: I'd be happy to create a mock "Context Customisation Window" or just a specification for this.

I can see two options - depending whether you have a list of "functions" somewhere;

1) show a grid of 3columns "functions", "show in context", "context shortcut"; from there you could opt-in up to N functions from that long list to be added at the bottom of the existing context menu by clicking in a checkbox in the column 2; as well as in a column 3 it would show (or allow to modify for the added functions) the keyboard shortcut to call this function once the context menu is active - i.e. just type in the "letter" that would call the function.

2) Separate dialog called Context menu options; There it would let you drag and drop functions in (as well as the order) from a list of available context functions - the principle is very similar to Customising Toolbars in LibreOffice. (Just please also add the shortcut "key" choice)

Good idea. I would love to be able to have options like translate/thesaurus and others in the right-click menu, like in MS Word.

I would also like the ability to add/remove options to the context menu (right-click menu). I highlight/bold/underline a lot of text in documents written by others for my profession and would prefer to have this available in the context menu like it is in Microsoft Office. This would be similar to adding/removing buttons/features to/from the "Quick Access Toolbar"; instead, there should be a section in the Settings menu of the ONLYOFFICE Documents Editor that allows the user to customize which features or functions are present in the context menu.

An example of this is: the user can remove the "AI" or "Hyperlink" options for a cleaner context-menu list, and add the "Highlight text"/"Highlight color" (which there is currently no customizable keyboard shortcut for) or "Copy Formatting"/"Paste Formatting" (which is currently performed by inputting Ctrl+Alt+C / Ctrl+Alt+V) options if these actions are used frequently by the user and preferred on the context menu.

You may find a demonstration of this feature in LibreOffice. Travel to the right-hand hamburger menu (or the "Tools" drop-down menu tab depending on your version) and click "Customize", where you are presented with a "Context Menus" tab that allows you to perform what is suggested here. This YouTube video demonstrates this at the 3 minutes and 35 seconds mark: https://youtu.be/m50H0AlylqY?t=215

Essentially: please give customization power to the user to manage which buttons/functions/features (that are already present on the Ribbon, or have a customizable keyboard shortcut for their action) appear within the context (right-click) menu. Thank you!

Sorry I don't know anything about programming.
but I like Only office.

Can you provide a link to a documentation of any other processor that describes the process of customization for the reference?

the user can choose what items they want to display in the menu. because cut copy paste is easily accessible with a keyboard shortcut, but there are some items that I use often but there is no keyboard shortcut for them. For example: highlight,

Please elaborate on your suggestion. What customization you suggest for the context menu exactly?

After selecting a word (or words) a customized right-click menu would be very practical.