Как по Английски будет welterusten

Any of numerous small terrestrial orchids constituting the widespread genus goodyera (also called rattlesnake plantain in north america); especially (more fully creeping goodyera) creeping lady's tresses, g. repens, of coniferous forests and bogs in both northern europe and northern north america. also (in form goodyera): the genus itself.

Expressing good wishes on parting at night or before going to bed.

Almost.

Used for saying goodbye to someone in the evening, or to someone before you go to bed or to sleep