[Kimiechi]

This wasn't me, but someone I know managed to ask for a "fromage" ice cream rather than a "fraise" one once...

[Etoile]

(Original post by Romanorum-Hellas)
Well, I was in Paris a while ago when I was a little nervous about speaking French. I wasn't expecting to make any conversation at all until a French woman at the hotel tried to ask me something, to which I accidentally said 'encule de ta mere, desole!' The look on her face said it all.

I have no idea how you would accidentally say that, but it's hilarious

[Emmzaa_x]

When I was on my French exchange I kept telling everyone I was 'excite' which literally means excited but the French use it to mean horny! And I was working in a primary school and accidently said the children were little c*nts instead of little cats (they were playing with the pompoms on my coat) cos I pronounced the 't' in chat. And my friend got the word for duck (cannard) mixed up with a really rude word equivalent to 'bastard' (connard) while we were trying to teach the kids duck duck goose... Yeah it went well :')

[4TSR]

When I first started to learn English, and instead of saying ... fat to muscle, I said "mat to fuscle" - My brother and his friend tease me about it to this day! (this was 5 years ago-ish)

[HanaKimi]

I went to the local shop and asked for a spoon instead of a body soap - I also went as far as 'you know body spoon?' - weirdest looks I ever got

[RandomPeopleDancin]

In prep for my German oral, my teacher asked me about planes and how they damaged the environment I replied that they were bad because they emitted 'Kartoffeln emissionen' (potato emissions). I meant to say 'Kohlenstoff emissionen' (CO2 emissions) needless to say she laughed quite a bit. Easy mistake when you're rather flustered by an unexpected question.

[Mequa]

A story I heard once was that a Fleming was trying to speak German, and what he wanted to say was: "I rang the bell and knocked on the door."

He put it as: "Ich habe gebellt und auf die Tür gebumst."

(If you don't know German, like myself, try Google Translate...)

[eggy_nog]

In my Latin exam last year there was a story about Nero. What the text actually said was 'It is said that Nero wore the clothes of a slave to disguise himself'. What I put was 'It is said that Nero's slaves wore no clothes'. Good times :P

[Dalek1099]

I once mispronounced furchtbar,in german and ended up saying a swear word.

[CLARA_]

I once typed 'arriba douche' when I mean 'arrivederci'...

[RandomPeopleDancin]

I just remembered another! A boy in out A-level German class said on his essay- 'Is it better to be single or in a relationship?' that it is good to have a Verhaeltnis. Verhaeltnis in this cotext read, 'it is good to have an affair' ( not a relationship!).

[such_a_lady]

Not a massive cock up as such, but I asked my German friend if she had a mirror but she heard it as me asking for a Bible

[rac1]

'je regarde des lentilles'

I'm sure there are many others.

[Cake Faced Kid.]

In my Welsh exam, my teacher asked me what my sister's name was, and I replied with 'I don't like cats.'

[Sva]

There is a Khmer song by Ros Sereysothea called "Chnam Oun 16" (I am 16). I asked my boyfriend if he could teach me the rest of the words (I only knew "Chnam Oun 16") and he told me that the next line was "Kmean Pruay Lai Na" which means "There are no problems".

Anyway, each subsequent time I belted out this song in some very public places I kept singing "Kmean Kruay Lai Na", which does not mean "There are no problems", but instead "There are no vaginas"...

Khmer people are frequently amused my foreigners pronunciation of the phrase "Juay knhom pong" (please help me), which frequently emerges as "Joy knhom pong" (please f*** me). I have also heard stories of mispronunciations of the phrase "kdov nas" (very hot) as "kdor nas" (very penis) and of waitresses being highly upset by requests for "teuk trey" (fish sauce) which end up as requests for "teuk srey" (lady water...)

[about_my_bow]

When i had my french exchange student over, i was trying to tell him that my legs hurt which should be something along the lines of "j'ai mal aux jambes"...i however said jambon instead of jambes which meant i told him that "my ham hurts". Him and my boyfriend laughed at me for quite a while after that

[theking1]

Writing

'' I am looking to dip my head in a pile of **** ''

Instead of '' Carlos should go to the bank ''

[realbookworm]

Mispronounced "sale" and so accidentally asked a waitress for pancakes with dirty butter... also said copain instead of copine and so told a girl that my brother was on holiday with his BOYfriend.

[RandomPeopleDancin]

When our Latin teacher was a kid and he heard people were remanded in custody, he thought they were kept in a cell with custard up to their necks.
"Death by custard"...awful way to go.

[Sigurðr]

I'm italian) I was holding a very patronising speech with my (english) girlfriend's family and i pronounced count as ****...everyone blushed and looked shock. I was lost.