The custom is a homophone. Translate the meaning and the inversion is a decoration. Describe the inversion and the arrival is gone. You need both, and only one language hears them as one.
The New Year custom of posting the character 福 upside down, so that 福倒了 (“fortune is upside down”) can be heard as 福到了 (“fortune has arrived”). The pun is Mandarin, where 倒 and 到 are homophones. It is not safe to assume every Sinitic variety makes the same pair.
Where the line breaks
Alignment of 福倒了 into 4 lanes. Arrives, thins, and breaks are written in each cell. The same information is in the text alternative below.
ZHParts
福Fortune
倒Upside down
到Arrive
ZHSource福倒了
福Source
倒Source
到Source
ENEnglishGloss for this platefortune, upside down, has arrived
fortuneArrives
upside downArrives
arrivedBreaksSound or wordplay
Gloss for this plate. A gloss that says both halves, because English cannot hear them as one word.
JAJapaneseGloss for this plate福が逆さ、福が来た
福Arrives
逆さBreaksSound or wordplay
来たBreaksSound or wordplay
Gloss for this plate. A gloss. Japanese New Year also posts 福. 逆さ (sakasa) and 来た (kita) do not sound alike. The character is shared; the pun is not.
DEGermanGloss for this plateGlück, auf den Kopf gestellt, ist da
GlückArrives
auf den Kopf gestelltBreaksSound or wordplay
ist daBreaksSound or wordplay
Gloss for this plate. A gloss for this plate.
FRFrenchGloss for this platele bonheur à l’envers est arrivé
bonheurArrives
à l’enversBreaksSound or wordplay
arrivéBreaksSound or wordplay
Gloss for this plate. A gloss for this plate.
Text alternative
English “fortune, upside down, has arrived” (gloss for this plate): breaks: sound or wordplay. Japanese “福が逆さ、福が来た” (gloss for this plate): breaks: sound or wordplay. German “Glück, auf den Kopf gestellt, ist da” (gloss for this plate): breaks: sound or wordplay. French “le bonheur à l’envers est arrivé” (gloss for this plate): breaks: sound or wordplay.
福Fortune
The character for good fortune, posted on the door. The writing is part of the utterance.
What happens to “福” in each lane
Lane
Form
Status
Break
What happens
English
fortune
Arrives
—
The meaning of 福 arrives.
Japanese
福
Arrives
—
The character is used in Japan too.
German
Glück
Arrives
—
Fortune arrives as a word.
French
bonheur
Arrives
—
The good arrives as a noun.
倒Upside down
倒: inverted. The paper is turned. In Mandarin, dào.
What happens to “倒” in each lane
Lane
Form
Status
Break
What happens
English
upside down
Arrives
—
The custom can be described.
Japanese
逆さ
Breaks
Sound or wordplay
Upside down, with no echo of arrival.
German
auf den Kopf gestellt
Breaks
Sound or wordplay
Described, not heard as the next word.
French
à l’envers
Breaks
Sound or wordplay
No homophone of arrival.
到Arrive
到: to arrive. Also dào in Mandarin. The ear takes the inversion as an arrival. The eye sees the inversion. The pun is the refusal to choose.
What happens to “到” in each lane
Lane
Form
Status
Break
What happens
English
arrived
Breaks
Sound or wordplay
Arrival and inversion are different English words. Stating both is an explanation of the pun, not the pun.
Japanese
来た
Breaks
Sound or wordplay
Arrived, with no echo of inversion.
German
ist da
Breaks
Sound or wordplay
A separate clause.
French
arrivé
Breaks
Sound or wordplay
Said beside the inversion, not inside it.
The joint
You paste 福 on the door upside down. A visitor says the paper is inverted, 倒了, and is answered, or answers themselves, that fortune has arrived, 到了. In Mandarin the two verbs are the same sound. The custom is a pun you can see. The character has to be upside down for the ear to have a reason to make the leap.
English can say “upside-down fortune” and it can say “fortune has arrived.” It cannot make those one event. A translator who wants the joke has to tell it, the way you explain a magic trick. The explanation is accurate and the trick is over. Japanese shares the character 福 and the New Year posting. 逆さ and 来た do not rhyme. The shared writing is not the pun.
The limit is marked because it is real: this is a Mandarin homophony. Cantonese dou for the two words is close and not the same tone story. The plate does not claim the custom fails in every variety. It claims the English, Japanese, German, and French glosses cannot hear the pair.
Why this break matters to a reader
A reader shown a photograph of an inverted 福, with the caption “good luck,” has been shown a decoration. A reader told the pun has been shown why the decoration is wrong-way-up on purpose. In a story set at the new year, the upside-down paper is a line of dialogue. Lose the homophone and the door says less than the people at the door hear.