Really, what is the problem to re-read a message after posting?
Or use "Preview" button before clicking "Post"...
I am not sure if preview works, I usually check after posting, because the Lazarus forum changes the font size to ultra-small quite often. But this time I have forgotten, sorry.
So @WP's solution works, I have downloaded the eplus.exe to take a look at @Bart's component (the Lazarus inbuilt character inserter needs some changes, IMHO), but for some reason „Invoegen/Speciale tekens“ (actually the whole „Invoegen“) is grayed in the menu.