Yes that was it! I am very good with rolling (trilling) my 'r's now, something brits from Scotland, Wales and far north of England do habitually but lost from the accents of southern English, North American English and Australian English speakers.
I remember now, when I used to pronounce Córka, it was with an 'S' sound. My work mate had to stress the 'C' ('ts') sound. This phonetic is difficult for us to hear. Thanks guys!
In "proper" English, there is a distinction to be made between the two (between 'a letter' and 'an e-mail').
However, this distinction is not usually adhered to and is often lazily overlooked (I don't object to that - languages evolve. But I'll explain it anyway)
The confusuion comes from 2 variables.
1) the fact that a "proper letter" these days can be created in various ways (electronic typing, written by pen, etc)
and 2) the fact that it can then be sent in various ways (by post, by attaching it to an email, by hand).
These 2 issues are do not directly cause or affect the other.
A hand written note could be delivered electronically (scanned, whatsapp photo etc), and an electronically-typed letter could be delivered by hand or by post.
What needs to be defined is what a "proper letter" is.
That is a seperate issue but as just an example, imagine a letter with the sender's address on the top right, the reciever's address a bit lower on the left, maybe a letterhead or logo at the top, etc (this is just an example)
A "proper letter" (eg from a govt official, a doctor, a solicitor, a contract) can be delivered by hand, by post, or electronically.
Here's the issue.....
If delivered electronically (ie. by e-mail) it is usually 'attached' to the e-mail in the formal of an 'attachment'. This is separate to the body of the e-mail.
In this case, people lazily will say "I sent him an e-mail" instead of "I sent him a letter BY e-mail".
The word 'e-mail' here is the equivalent of an envelope (by post) etc. It is the 'method of delivery'. Electronic mail.
You would not say "I sent him an envelope" so you shouldn't say "I sent him an e-mail"
But.... You could however say "I sent him a letter in an envelope/by post" and so then you could also say "I sent him a letter by e-mail".
Official letters are ALWAYS typed separately and then added to the e-mail body as an 'attachment'. Usually with a note saying 'Please find attached' or something.
The e-mail could be sent to a secretary, but the "letter" inside it would be naming the main person.
When that "letter" is printed for, for example, proof in a court case or historical archiving etc, the letter itself will NOT state the 'date of delivery' or 'method of delivery' or sender's e-mail address or time it was sent.
Just like you wouldn't keep the envelope or the stamp. You should't be able to tell JUST ONLY from the letter, how it was delivered or if it was delivered at all.
Ofcourse we exchange many many e-mails during the day, several back and forth in a minute sometimes. But these are rarely called "letters". For example, if confirming a meeting later on, or discussing things, that would be the right place to say "I've sent him an e-mail".
Anything more formal, or once fully discussed, will then usually by formalised into a " proper letter" and then sent by post or attachment.
There has recently been discussion if the body of a casual e-mail could legally be counted in court as "official correspondence" and I think it can. But in proper English, I still wouldn't call an informal, casual paragraph or two "a letter".
But hey, languages evolve.