The word ᴱQ. polka “pig” appeared in the Qenya Lexicon of the 1910s, under the early root ᴱ√POLO “have strength”, but Tolkien marked it with a “?” (QL/75). However, it appeared elsewhere as an element in ᴱQ. karkapolka “boar” = “*tusk pig” (QL/48).

Neo-Quenya: I’d retain this word as ᴺQ. polca for purposes of Neo-Quenya, since √POL survived in Tolkien’s later writings.