Just as your manner of approach to different people changes depending on that person, so the behaviour and respose of an entity must surely change with the individual with whom he is interacting? I do not think it stands to reason that if the
"vocabulary of the summoner/contacter is limited, the vocabulary of the entity will be limited as well (assuming communication is in words)." It may be conceivable that the summonser is a deaf mute, in which case the entire conversation is limited to a series of unintelligble grunts or within the mind. Does that limit the entiry to the same vocal output?
I am very unsure about this servitor issue so I cannot make a intelligent comment, but suffice to say that in my opinion if you want an entity to perform the role of servitor or that of a dominant being, then it is the degree of your mind control which governs the attitude of the entity.
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