for me it fails in Java.
if I change this: ->
assertEquals("Halifax, Montreal, Toronto, Chicago, Winnipeg, Seattle",
routes.findRoutes(new String[][]{{"Chicago", "Winnipeg"}, {"Halifax", "Montreal"}, {"Montreal", "Toronto"}, {"Toronto", "Chicago"}, {"Winnipeg", "Seattle"}}));

to this: -> assertEquals(Chicago, Winnipeg, Seattle",
routes.findRoutes(new String[][]{{"Chicago", "Winnipeg"}, {"Halifax", "Montreal"}, {"Montreal", "Toronto"}, {"Toronto", "Chicago"}, {"Winnipeg", "Seattle"}}));
it works fine but still it is changed back when pressing submit.

Let me know what is confusing?
And this Kata won't be posted if the test cases are failing.

like @SimonR mentioned, the second test case is confusing and failing in Objective C

maybe you can create a new one :) and not under rate the kata for your own reasons.

Numbers -> Names

• 1 -> "one"
• 2 -> "two"
• 3 -> "three"
• etc...

Sort the names of the numbers
So [1,2,3] -> [1,3,2]

I already emphasized that it is only set as an Example since decalration of Array in Java differs from other Languages.

What about this example test case for Java? It contradicts your statement...

assertEquals("Halifax, Montreal, Toronto, Chicago, Winnipeg, Seattle",
routes.findRoutes(new String[][]{{"Chicago", "Winnipeg"}, {"Halifax", "Montreal"}, {"Montreal", "Toronto"}, {"Toronto", "Chicago"}, {"Winnipeg", "Seattle"}}));

The ORDER of the Place(s) where route was taken.

As set in the EXAMPLE
the given array of routes were as follows:
[[USA, BRA], [JPN, PHL], [BRA, UAE], [UAE, JPN]]

The return or result should be: "USA, BRA, UAE, JPN, PHL"