Doesn't work as good if one has ears.
French of course also have many original grammatical torture instruments. You might think that as a bastard child between Latin and the Germanic Frank tribe dialects it’s no wonder, though elimination of noun declension is rather surprising from this perspective. The truth is that all languages out there have their own dungeon with many traps and treacheries included.
Fortune, nun ni ĉiuj parolas Esperanton. Kaj ne forgesas la akuzativo nin. :D
For me it was when I had to realize that for the French, every number larger than what they can count with their fingers becomes a small algebra problem. quatre-vingt-dix-neuf ... four times twenty plus ten plus nine makes 99.
Celtic remained a strong influence around modern France, Belgium, the Netherlands so we end up with French counting partially in 20s, even though continental Celtic languages are extinct (Breton, spoken in north west France is an insular Celtic language, more closely related to Celtic as spoken in the British isles and Ireland.)
I don’t know how Danish got base 20 counting though. Must have more reading to do.
The part where you have to have the equivalent of a LIFO stack in your brain, piling stuff up and praying you won't overflow, until the effing verb finally shows up and deigns informing you of what is actually happening in the sentence, well that is not, I believe an attribute of French, and definitely specific to German (I believe Japanese has that to a certain extent has well).
https://www.youtube.com/watch?v=6pY-0JfEdLY
(From a mockumentary)
Good times.