Note that em (current point size) and en (½ em) spaces are both wider than the regular space character (typically ¼ em). An espace fine insécable (narrow no-break space) is even smaller, usually as small as a Unicode thin space (⅕ or ⅙ em): https://jkorpela.fi/chars/spaces.html

Word, in French mode, inserts regular no-break spaces where narrow no-break spaces would be appropriate. I find this style rather irritating, but then again, I don’t read nearly enough French to get accustomed to it.

However, I do agree strongly with the late Jan Tschichold, who recommended thin spaces before question marks, exclamation marks, colons, and semicolons for other languages, too: https://www.courses.psu.edu/art/art101_jxm22/tschichold.html...