Русский is the language she speaks with you, not the work on the table. In Berlin it opens the conversation that sets the hour: what you want, where it happens, and what erotic massage or tantric massage will actually cover.
Three things to settle first
- Write in Russian from the start; a reply in English is fine, but the first line tells her how you will talk for an hour.
- Agree whether the session runs in her own private apartment or yours, as Berlin’s dispersed rooms make travel time part of the cost.
- Name the technique plainly so the price and length match what you expect, without guessing from a photo or a title.
The pair matters because a fluent exchange shortens the gap between your wish and what she does. Keep the channel open for changes, and let the room stay hers.