I just wanted to comment that there are some places where the attendance at an EF Mass exceeds the numbers you mentioned. For example, the FSSP parish (it’s actually a parish) in Dallas has 3 Sunday Masses, and I am told there are about 1000 registered parishioners. Before it was a parish, it was only a small community of about 200, largely because 1) it was not a parish and 2) it was held at a Carmelite chapel with maximum occupancy of approximately 80. Granted, this is probably the exception rather than the norm.
We are not discussing what is happening in one parish (or for that matter, a handful of parishes) in the US; we are talking about what is going on world-wide. I appreciate the update, but the issue is what is going on in other than what might be called first world countries. My reference has to do with a world-wide look at the EF.
Latin was specifically related to the Roman empire; it was not the first or even the second language of the Church - Aramaic being first and Greek being second.
It took hold primarily in Europe; and only after a number of centuries, when the language was extended elsewhere throughout the world because of missionary work by Roman rite and its exclusive use of Latin, did Latin appear in other countries…
However, the Church did not wait for the Latin/Roman rite to spread around the world; in other cultures, the local languages were used; and the result is a Church with what - 22 rites? The Eastern rite churches use the local language from which they sprung, even though much of that may no longer be the current language (that is, Old Slavonic is not the same as current Slavonic, and for sure current Greek is not koinae Greek - having read the latter and then tried to read the former!).
In the US, the Maronite rite uses a mixture of Aramaic, Arabic, and English.
The point is, as the Church started, Mass was celebrated either in the local language, or a second language familiar to many if not most who were attending.
As the Roman empire expanded, the use of Latin expanded into areas with similar and non-similar languages. But Latin was used by the conqueror, and just as people in Jerusalem understood Latin as well as Greek (having been conquered by both) as well as Aramaic and Hebrew, so people in other parts of the world used a common language for worship - just not Latin.
Latin has nothing in common with Arabic; for that matter, neither does Greek. And neither have anything in common with the tonal languages of Asia. Latin has been used in those countries as the Roman rite made toeholds through missionary work. However, there seems to be little likelihood that Latin will have much if any impact in those countries now or in the future.