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As categorized by UNESCO and as discussed in Wikipedia, fluent speakers of the actual Jeju language were all born in the 1940s or earlier. The following terms relating to modern concepts are not likely to be found in traditional Jeju, which was spoken solely by impoverished peasants. As what is now spoken in Jeju Island—an indubitably Korean dialect—is not what we mean by Jeju in Wiktionary, I believe these entries should all be deleted unless someone can provide an actual early attestation (preferably from the very first academic studies of the dialect, in the 1960s). The Digital Museum for Endangered Languages and Cultures or the NIKL dictionaries ported at Urimalsaem is not necessarily reliable in this regard, since they do not really make this distinction.

Making the distinction between traditional, soon-to-be-extinct Jeju and Category:Jeju Korean is crucial for maintaining some integrity in Category:Jeju lemmas. The most credible dictionary of Jeju, 개정증보제주어사전Category:Pages using lite templates, does not bother with these modernisms and I believe we should follow their lead. — This unsigned comment was added by Karaeng Matoaya (talk • contribs) at 19:58, 5 December 2020 (UTC).

To anyone who's going through these, please do not delete them for now, as I'm finding cites and am planning on making a complete update soon, but have been behind recently. Thanks! AG202 (talk) 07:43, 4 February 2022 (UTC)

I know that your opinions have changed a lot since this comment and that we've been able to find a TON of material made in Jeju, so I don't fault you at all for making them at the time. Since the start of the revitalization efforts, there have been more materials being made in native Jeju by Jeju natives (and not in 제주 사투리Category:Pages using lite templates) and more lexicons being made, so I don't necessarily agree with saying that everything must be from pre-1960, as even if the only Jeju speakers were born in the 1940s or earlier (there are younger Jeju natives but they're more rare), they'd still be able to make up new terms for things that have come into play since then. However, I have deleted the senses that I am completely unable to find and don't think that I will find, per the RFV guidelines. Additionally, the cites that I have found have been written by-and-large in native Jeju and not Jeju-tinged Korean, by or the with consultation of native Jeju speakers and have been published either by the Jeju Preservation Society, the Jeju Provincial Government, or in related Jeju studies. AG202 (talk) 00:03, 28 June 2022 (UTC)

"Biosphere" in the modern scientific sense.

RFV-failed. Was only able to find it in the name of something, not an actual usage. AG202 (talk) 00:06, 28 June 2022 (UTC)