They should be documented and recorded, so that we have them as a record to help with our understanding of how language evolves, so to an extent, yes.
However, using true Old English, essentially a different language from modern English, as an example, we shouldn't try to force languages to remain static since they constantly evolve. Same with letting languages slowly meld into other languages.
I have no problem with languages 'dying out' as long as we have a very good understanding of the language, like we do with Latin. We should start documenting the few obscure languages in third-world countries so that we don't lose our chance at understanding the language like we almost did with ancient Egyptian.
However, using true Old English, essentially a different language from modern English, as an example, we shouldn't try to force languages to remain static since they constantly evolve. Same with letting languages slowly meld into other languages.
I have no problem with languages 'dying out' as long as we have a very good understanding of the language, like we do with Latin. We should start documenting the few obscure languages in third-world countries so that we don't lose our chance at understanding the language like we almost did with ancient Egyptian.