I'd perhaps go for "major" spelling reform. German has had a small one around 2000 as well, but such reforms don't do much to change the overall situation (unless repeated every 10 years, I guess).

> He changed the –ce in words like defence, offence, and pretence to –se; abandoned the second, silent "l" in verbs such as travel and cancel when forming the past tense; dropped the "u" from words such as humour and colour; and dropped the "k" from words such as publick and musick.

Isn't most of it just the difference between british and american english? I was definitely taught the "old" style in my english education and still see it being used. So it does not seem to have been really universally acknowledged/adhered to as a reform?

Not that english language has not changed but it seems that there is not as much of a centralised, widely adopted and intentional reform to match the written form with the spoken one.

That’s still nothing like the reform other languages have had.

The editors of major English dictionaries have certainly had significant impact on English as She is Spoke, but we cannot ignore the fact that the Spanish language is centrally codified and prescriptive (like the French language), while English is distinctly decentralized, and its dictionaries are correspondingly descriptive, more often than not.

Spanish has notably gone through some orthography reforms since I learned it in high school, in the 1980s, and so among other things, the idiosyncratic "sort order" which we learned doesn't really apply anymore. In school, we also learned to be aware of the vosotros first-person plural, but we didn't really learn all the forms, because we were chiefly learning Mexican/LatAm vernacular Spanish.