? how would you classify this language ?

 Please bear with me for a moment, as your reply to this will greatly expand
my understanding of language groups & language evolution...

 Assume that, tomorrow or the next day, you either encounter or create a
(con)language which has the following features:
* Indo-European word order.
* Semitic grammatical rules.
* Sino-Altaic phenomes.

 into which group would you classify it, however tenatively?

 also, which of those (rules/phenomes/order/other) is most prone to change
through time?  which is least prone to change?

 thank you.

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