In Excel, press F2 to edit a cell, and CTRL+<left> and CTRL+<right> move between words (delimited by spaces) or formulae (delimited by = or "("). This is standard expected behaviour for Windows and Linux Mint (subject to configuration).
In WPS Sheets, CTRL+<left> and CTRL+<right> move to the beginning and end of the cell's contents, which is damned inconvenient. The thing that typically needs editing is the word in the middle of the cell's contents, no matter what language the editor type! The workaround is to copy the cell into Text Editor, edit it properly there, and paste back into WPS Sheets!
This is a hygiene factor. Please fix urgently.
WPS v 11.1.0.8392
Linux Mint 18.3 Xcfe 32bit