According to the table https://wikitree.sdms.si/function/WTShowTable/Table.htm?table=Countries&filter=NLD
there are 4885 locations ending with NL and 1760 with NLD ending.
I have a plan to add all not accepted spellings as a suggestion.
I already did that in suggestions, that a user can enable.
460 Profile completeness - Birth Location Country not correct
466 Profile completeness - Death Location Country not correct
Another attempt to correct those was
616 Birth Location Country not official
646 Death Location Country not official
676 Marriage Location Country not official
that checks orphan profiles. But since that generates too many of them it still didn't got released.
Maybe approach where we do that just for a few abbreviations would be the best and we can add them as users want.
Jan, if you are interested in field meanings, I can explain them (I already did a few over time), but they can be complicated. "Ignore for spelling" means that this spelling will not be used for 608 suggestion.