philosopher, >> A newspaper named Der Emes would be spelled in Yiddish דער אמת
FOUR mistakes in the word “emes” from the actual paper … Should shock you into how much we know of language and, in this case, history …
>> was surprised that they did not mention the third reason, loshen, that they spoke their own language was the third reason Hashem took the Jews out of Egypt
this is a good point, sad when Torah is presented in a convenient way to conform with the hashkafah .. also, note that Yiddish obviously originated as a mixture of Hebrew and the local German language. If Jews in Mitzrayim spoke something like a mixture of Hebrew and Mitzri, not sure the Midrash would say that they spoke their own language. Possibly true, that at some point Jewish groups adopted old-style levush and loshon to resist modernity, but not to say that either of them originated as distinct.
In regards to the midrash, possibly a case can be made that these are last-resort measures that were necessarily in the presence of slavery and the absence of any other ways to unite between Jews and separate from Mitzrim. One would think that Torah might be a sufficient way to separate.
By this logic, those who learn may not need levush, those who do not – do.