Tongue

Werdhom word conservation score = ★★★★

English: a tongue, the tongue

Dutch: een tong, de tong

German: eine Zunge, die Zunge

Danish: en tunge, tungen

Norwegian: en tunge, tungen

Swedish: en tunga, tungan
Icelandic: tunga, tungan

From Proto-Germanic: tungǭ

French: une langue, la langue

Spanish: una lengua, la lengua

Portuguese: uma língua, a língua

Italian: una lingua, la lingua
Romanian: o limbă, limba 

From Latin: lingua, linguae

Polish: język

Russian: язык (yazyk)

Bulgarian: език (ezik)

From Proto-Slavic: ęzỳkъ

Lithuanian: liežuvis, liežuvis

From Proto-Indo-European: dn̥ǵʰwéh₂s

Note: The underlined languages have been reconstructed by comparative linguistic researchers. The word may be inaccurate, as there is no archaeological record of the language at that time.