Or easier to concentrate on, like you suggested. Most fluent speakers don't tend to think very deliberately about the words they're choosing; maybe a beginning student of a language would actually stand a better chance of maintaining it here, if only because he or she would have to think more about it as it was said.

[Eee, Da Vinci.]

Ah, his mirror writing. Simple, yet surprisingly effective. Though some think he wrote that way out of simple practicality because he was left-handed, and so writing right to left kept the ink from smearing.