There's a swallow's nest in my house. It has been said from old times that its presence brings good fortune.
「我が家にはツバメの巣があり、それは古くから幸運をもたらすと言われています。」
For instance, it is believed that stores where a swallow's nest has been built, will thrive.
例えば、ツバメの巣が作られた店は繁盛すると言われています。
The year a swallow's nest is built, one's financial luck is said to improve and people have been known to blessed with a child.
ツバメの巣が作られた年には金運が上がり、子供に恵まれるとも言われています。