In English, there is an implied difference between “the girl downstairs was playing violin” (‘the girl’ implying expected knowledge - “oh, her”) versus “a girl downstairs was playing violin” (‘a girl’ - random, likely unknown).
More broadly “a thing” - one of many, “the thing” - a specific one.
Don’t know about Farsi, but in Russian you would have to declare your knowledge and specificity of the subject. You can transmit some of that information by changing word emphasis, but it’s not very clear.
As for your sentences I would translate them as:
The girl downstairs was playing violin → Девушка [girl] внизу [downstairs] играла [was playing] на скрипке [violin].
A girl downstairs was playing violin - Внизу [downstairs] девушка [girl] играла [was playing] на скрипке [violin].
The first one puts more emphasis on the “girl”. The second one puts more emphasis on “downstairs”, almost suggesting that the identity of the girl doesn’t matter, kinda “some girl who happened to be downstairs”. But it is not as explicit as a definite/indefinite article for sure.
If you want to make it certain that the identity of the girl doesn’t matter, you could use an adjective to that extent: Внизу [downstairs] какая-то девушка [some girl] играла [was playing] на скрипке [violin].
If you want to make it certain that both you and the person you’re talking to know about the girl, you can use a determiner: Та девушка [that girl] внизу [downstairs] играла [was playing] на скрипке [violin].
Is the number one used like “a” then? Like a direct translation of the 2 phrases would be “Girl downstairs is playing the violin.” and “one girl downstairs is playing the violin.” As opposed to English using the/a respectively?
In English, there is an implied difference between “the girl downstairs was playing violin” (‘the girl’ implying expected knowledge - “oh, her”) versus “a girl downstairs was playing violin” (‘a girl’ - random, likely unknown).
More broadly “a thing” - one of many, “the thing” - a specific one.
How would that translate to Farsi?
Don’t know about Farsi, but in Russian you would have to declare your knowledge and specificity of the subject. You can transmit some of that information by changing word emphasis, but it’s not very clear.
As for your sentences I would translate them as:
The first one puts more emphasis on the “girl”. The second one puts more emphasis on “downstairs”, almost suggesting that the identity of the girl doesn’t matter, kinda “some girl who happened to be downstairs”. But it is not as explicit as a definite/indefinite article for sure.
If you want to make it certain that the identity of the girl doesn’t matter, you could use an adjective to that extent: Внизу [downstairs] какая-то девушка [some girl] играла [was playing] на скрипке [violin].
If you want to make it certain that both you and the person you’re talking to know about the girl, you can use a determiner: Та девушка [that girl] внизу [downstairs] играла [was playing] на скрипке [violin].
I guess the is implied, count is explicit. A thing becomes one thing and the thing becomes thing.
Is the number one used like “a” then? Like a direct translation of the 2 phrases would be “Girl downstairs is playing the violin.” and “one girl downstairs is playing the violin.” As opposed to English using the/a respectively?