Lyxen
Great Old One
Chalk up another argument to the absurdity of natural language in game rules.
And then some of us happen to like it, because it keeps it a simple game without the absurdly complicated jargon that PF created (moving is a physical effect of the move action, not just, you know "moving").
But if you read the rules reasonably without trying to milk them for all they're worth, there is a condition, "charmed" which is quite clear, and used by a number of spells to denote a sort of mind control, and it is also used by Mind Blank. So spells which mention that condition are clearly affected by Mind Blank and others are not. The fact that it does not appear in Command, combined with the "spell do only what they say they do" principle gives a clear cut answer.
It might be a mistake, or it might be the intent, in any case, it has little to do with natural language because in that specific case you have a clear condition which is not natural language but defined in the condition glossary.