Okey dokey ,the whole nine yards is military slang for "the full monty" which is also military slang. The military does come up with more than its share of slang words for some reason or other.

Ok is a word that definitely does travel . I can understand how Indians might have thought they came up with it first - Nigerians I've spoken to claim it as a west african word.
Is there a term for the coming together of words from different languages that have similar sounds , but which come from different meanings in the source languages ? A bit like a mondegrene . Sorry for sounding convoluted ,here's an example.

Irish speakers will tell you that the word shanty comes from the Irish words shan + ti = old house.

Dictionaries give a different origin:
"rough cabin," 1820, from Canadian Fr. chantier "lumberjack's headquarters," in French, "timberyard, dock," from O.Fr. chantier
Which is right ?

Whoever is right , a french speaker would have understood an Irish speaker and vice versa because , whatever the etymology ,they were talking about the same phenomenom - ie poor housing . When the new word "shanty" arose it was on the basis of this shared sound.