[gleenn]

How does that work with e.g. French Creole which has French, Carribean, and English in it. What if this feels like a dialect but the percentage of any given parent is less than your cut-off percentage? You make the rule sound very easy to interpret but I think the general principle is that language classification is nuanced and the irony of the "navy and army" language requirement are it kind of has nothing to do with the actual language spoken.

[samus]

The "navy and army" argument is usually employed when the question arises whether something is a dialect or a separate language. IMHO such Creoles should also be classified as languages, with the caveat of dialect continuums.

Creole is a weird case IMHO because English itself is pretty much a creole between Old English, Norman French, Norse, and some Gaelic and Pictish languages.