[lelanthran]

That's just a side-effect less isolated communities.

As more and more people from within different communities interact, the value of a common language increases and the value of the isolated language decreases.

The eventual equilibrium is going to be maybe 3 languages left, with each individual in the world able to speak at least 2 of them.

Any effort expended on keeping languages alive is pointless.

[kaashif]

> Any effort expended on keeping languages alive is pointless.

Pointless ultimately, maybe. But languages can even be revived from nothing to have millions of native speakers, see Hebrew.

[lelanthran]

> Pointless ultimately, maybe. But languages can even be revived from nothing to have millions of native speakers, see Hebrew.

But, it's a lot of effort and energy expended: https://en.wikipedia.org/wiki/Hebrew_language#Current_status

> The Haifa municipality has banned officials from using English words in official documents, and is fighting to stop businesses from using only English signs to market their services.[85] In 2012, a Knesset bill for the preservation of the Hebrew language was proposed, which includes the stipulation that all signage in Israel must first and foremost be in Hebrew, as with all speeches by Israeli officials abroad. The bill's author, MK Akram Hasson, stated that the bill was proposed as a response to Hebrew "losing its prestige" and children incorporating more English words into their vocabulary.[86]

With enough energy (time, money and influence), you can revive any language, even dead ones.

You can do that, and you can continue expending more effort into making sure it doesn't decline again, but eventually whatever is popular globally is going to dominate, even in the face of legislative actions that force the use of the language. Each generation will have less and less use (outside of forced use) for the non-popular language.

Even though Latin is extensively legislated for use in Law, and used popularly in the Sciences, it still died.