every year, some languages go instinct , it is a part of our Human History that vanishes forever so we should not lose them , don't you think?
I would not.
Well the thing here is that for example even one of the worlds most spoken languages, English, is not spoken like it was a few hundred years ago. Try to read Shakespeare English. Languages change, languages disappear. Dialects also disappear now language within a country is more standarized, through faster communication, transport, migration.
That does not mean I like cultures to go instinct, and that we all should be the same. I do not like it when the Dutch children celebrate Halloween, and not Saint Martins day, for example. But lending a few words from English is not a problem. Nor speaking standard Dutch and not a separate dialect in every region.