Here is a summary of words meaning " (limestone) cave."
Thanks to those who have commented on the Facebook page.
-- c/k --
English: (limestone) cave
Portuguese: (calcário) caverna
French: caverne (calcaire)
Spanish: cueva (de piedra caliza)
Catalan: cova (de pedra calcària)
Esperanto: (kalkoŝtona) kaverno
Ilocano: kueba (ti bato apug)
Basque: (kareharrizko) koba
langue d'oc: cauna (de calcari)
Arabic: كهف الحجر الجيري
Usik (conlang): kauni
Tagalog: kweba
-- g --
Italian: (calcare) grotta
Corsican: grotta (di calcariu)
Maltese: grotta (franka)
French: grotte (de calcaire)
Dutch: (kalksteen)grot
Breton: groc'h/groh (grec'hier)
Hindi: (चूना पत्थर ) गुफा[cuna pt'thr gupha]
Nepali: ( चुन ढुङ)्गा ग[chn-dhunga-gufa]
Sindarin (conlang): gath, gathrod, (n)groth
-- h --
German: (Tropfstein)höhle
Vietnamese: hang (đá vôi) (𥧎𥒥𥔦)
Alsatian: d' Hehla/d'Hehl (vu Kàlchänthàltig)
-- m --
Georgian: მღვიმე [mghvime]
Azerbaijani: mağara
-- p --
Swahili: pango (la chokaa mawe)
Russian: (известняк) пещера
Bulgarian: пещера
-- b --
Franco-Provencal: bârma
langue d'oc: balma (de calcari)
Hungarian: barlang
-- f --
Sindarin (conlang): fela
-- d --
Chinese: (石灰岩溶)洞 [shíhuīyán róngdòng]
Korean: (석회)동 [seoghoedong]
Japanese: (鍾乳)洞(しょうにゅうどう) [shounyudo]
-- l --
Finnish: luola
Tagalog: langob
-- r --
Ilocano: rukib (ti bato apug)
-- s --
Corsican: sapara (di calcariu)
-- y --
Slovak: (vápencové) jaskyne
Czech: jeskyně
Polish: jaskinia
Tagalog: yungib
-- u --
Irish: uaimh (aolchloiche)
-- o --
Welsh/Cymraeg: ogof
