I'm not sure the reason why you posted the article, perhaps it is to show that Mexico is more multilingual than the USA, which actually is probably true, but I have a different view of the SEP.
For the first 50 years of its existence the SEP had a monolingual Spanish-only policy. That article quotes Nuño as saying that English classes started in 1926, that's a self-congratulatory stretch. I can't remember who was in charge of the SEP that year, Vasconcelos had already resigned, but it was during the nation-building revolutionary governments.
Mexico has not exactly been at the forefront of linguistic rights. I've read Nuño's interviews regarding indigenous cultures and languages and they are filled with a bunch of vague platitudes.