tact
The German word 'Takt' is a noun that is used in the context of music to refer to the beat or rhythm of a piece. It is also used in a broader sense to mean 'tact' or 'diplomacy' in social situations. However, in the context of this question, 'Takt' is the direct translation of the English word 'tact'.
Please keep the beat.
This phrase is used in a musical context, when one person is directing others to maintain a consistent rhythm or tempo, as in a band or orchestra.
He has a good rhythm.
This phrase could be used to complement someone's ability to keep time in a music sense or their rhythm in activities that require consistent time-keeping.
We have to stick to the beat of the music.
This statement could be used in various scenarios where there is a need to follow the rhythm of a music piece, such as in dance, choir or playing a musical instrument.