Start with what is solid. For any induction to work, the person has to understand the words and feel at ease with the voice delivering them. If the language is hard to follow, comprehension drops and so does the chance of settling into a deep state. That much is straightforward, and it applies to everyone, not only people who speak more than one language.
Where it gets more interesting, and less certain, is the idea that for a multilingual person one language reaches deeper than another. The reasoning behind it is plausible. A first language, especially one learned in childhood, often carries more emotional weight and is closer to a person’s inner voice, so suggestions delivered in it may land with less effort. Many therapists who work with multilingual clients lean on exactly this intuition and ask which language a client thinks, feels, or talks to themselves in. The intuition is reasonable. The direct research measuring how much deeper trance actually goes in one language versus another is sparse.
It also matters that “language structure” is doing a lot of work in the question. Rhythm, pacing, the choice between gentle and direct phrasing, and the use of metaphor all shape how an induction feels, and these vary across languages and across individual speakers. But there is no good evidence that any particular grammar reaches the subconscious more efficiently, and claims that one language is inherently more hypnotic than another should be treated with caution.
The honest division looks like this:
What can be said with confidence:
- comprehension and comfort with the language strongly affect how well an induction works
- a person’s emotionally dominant language is a sensible thing to ask about and consider
- rapport and the practitioner’s delivery matter at least as much as word choice
What remains uncertain:
- exactly how much trance depth differs between a person’s languages
- whether specific grammatical structures deepen trance on their own
- that switching languages mid-session predictably deepens or breaks a state
For practical purposes, matching the induction to the language a person feels most at home in is a reasonable starting point, grounded in comfort and meaning rather than in a proven mechanism. The part to be careful with is the leap from “this feels more natural” to a confident science of language and trance depth that the evidence has not yet built.