我们已经在旅馆登记入住。

We've checked in at the hotel.

《牛津词典》

我会给旅馆打电话，通知他们明天我们将登记入住。

I'll call the hotel. I'll tell them we'll check in tomorrow.

《柯林斯英汉双解大词典》

五月份以来，登记入住的外国人很少。

Since May, very few foreigners have checked in.

youdao

One thing that he always did when he went on his grand tour is he always took fake names, as if he was signing into a hotel as Mr. and Mrs. John Smith.

当他环游西欧时,他常常使用假名,就好像入住酒店时登记用"张三"或"李四"做名字一样

耶鲁公开课 - 欧洲文明课程节选