Spanish and Italian have a few funny ones:

Burro: Donkey (Spanish) / Butter (Italian)

Porro: joint (of weed, you know) / Leek

Orto: Ass (not everywhere, but where I lived, it had that meaning) / vegetable garden

There’s probably more, but these come to mind now.

To add a funny one:

(Hint for Americans: the joke makes more sense if you pronounce it with a British accent)

One of my favorites are the chains between Spanish and Portuguese:

• Garbage in Spanish is Basura
• But Vassoura in Portuguese means broom
• But in Spanish broom is said Escova
• Which in Portuguese means brush

Or

• Tea cup in Spanish is Taza
• A Taça in Portuguese is a wine cup
• But in Spanish wine cup is a Copa
• And in Portuguese a Copo is a regular glass
• But in Spanish regular glasses are called Vaso
• Which in Portuguese means vase.

Or

• Cutlery in Portuguese is Talher
• But Taller in Spanish is a workshop
• Which in Portuguese is Oficina
• Which in Spanish means office
• But in Portuguese you say Escritorio
• Which in Spanish means desk

Or a short one:

• Your last name in Portuguese is your Sobrenome
• But in Spanish Sobrenombre is your nickname
• While in Portuguese nickname is Apelido
• But in Spanish Apellido means last name

Another one I like is Vamos a chatear 1 rato which in Spanish means “let’s chat for a little while” but in Portuguese means “let’s bother a mouse”.

If I understand your question correctly, between English and Italian is “camera”. In Italian it means “room”, not a device for photographs.

English/german has Gift and Die.

Probably others but idk.

It’s not just in different languages, but sometimes in different variants of the same languages.

For instance, in Belgian French, “tournante” is any task in which people take turn, like a card game. In French French, it’s specifically gang rape.

And then you have words that aren’t spelled exactly the same way but seem like an obvious translation (actual false friends, which aren’t usually exact matches), like the Spanish “constipado”, which means to have a stuffy nose and not what you think.

Assister in French means to attend in English

I’m going to spoiler tag this because it’s a slur but I’ve always found this one the most comical

Both who/hoe and wie/wie are pronounced almost identically. Always creates a knot in my brain that usually grinds my already not fluent speaking to a halt.

There are a few close ones between Portuguese and Spanish but I can’t think of any that’s spelled exactly the same.

Between Portuguese dialects, the first that comes to mind is “puto” which just means young boy in European Portuguese and it’s a swear word meaning male prostitute in Brazilian Portuguese (Brazilian Portuguese technically makes more sense because it’s symmetrical to the female “puta” which always means “slut”).

embarrassed and embarazada (pregnant) in Spanish

I remember the Czech word Pozor. It means “Attention” and is seen everywhere on all sorts of signage.

In Russian, however (and possibly other slavic languages), it means shame/disgrace.

I’m sure there were jokes about it when Russians were the invaders, but can’t remember any.

Then there’s Finnish/Estonian

But my favorite is “nahkhiir”, which means leather mouse, i.e. a bat. (in Finnish it would be nahkahiiri, but bats are called lepakko)
Batman is consequently called Nahkhiirmees in Estonian.

Greek: Ναι (ne) means yes. Greeks often move their head up and down to say yes.
Bulgarian: Не (ne) means no. Bulgarians often move their head up and down to say no.

So if someone says ne and moves their head up and down it could be a Greek saying yes or a Bulgarian saying no. In reality the movements are not the same but it would probably be confusing to an outsider.

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Mood

Actual. English: real. Spanish: current

Sensible. English: reasonable. Spanish: sensitive