I think that it's a mistake to teach AI to any language other than
Lojban is not a natural language for sure (because it wasn't really
tested for variety of real life communication purposes).
The reasons why strong AI has to be taught to a natural language, not to Lojban:
1) If AI understands natural language (NL) then it's a good sign that
the core AI design is correct and quite close to optimal.
If AI cannot learn NL then it's a sign that core AI design is wrong.
If AI can learn Lojban --- it proves nothing from strong AI standpoint.
There are a lot of VB, Pascal, C#, C++ compilers already. So what?
2) NL understanding has immediate practical sense.
Understanding of Jojban has no practical sense.
3) NL text base is huge.
Lojban language text base is tiny.
4) Society is "the must" component of intelligence.
Huge amount of people speaks/write/read NL.
Almost nobody speaks Lojban.
If you spend time/money on design/teaching AI to understand Lojban ---
it would be just a waste of your resources. It has neither strategical nor tactical use.