Can you translate this?

[Mistery]

For the first sentence, you said:
Soon someone will comme across something invisible, and try to figure it out.

Well, it's not someone but: he/she (which is the same in Hungarian, there is no distinction between them. I, you, he/she etc. are not used anyway, only if you want to stress it, like "I did" and want to point out that it was really you). In Hungarian, the declination of the verb shows the time/tense, the person etc.

So "Soon he/she came across" is correct, the rest not yet.

Do you need hints?

[Lilliputt]

For the first sentence, you said:
Soon someone will comme across something invisible, and try to figure it out.

Well, it's not someone but: he/she (which is the same in Hungarian, there is no distinction between them. I, you, he/she etc. are not used anyway, only if you want to stress it, like "I did" and want to point out that it was really you). In Hungarian, the declination of the verb shows the time/tense, the person etc.

So "Soon he/she came across" is correct, the rest not yet.

Do you need hints?

Do ya need ta ask? YES! *Thinks da alien wrote da sentence on purpose ta drive da little islander *

[Mistery]

Hamarosan r?akadt n?h?ny elrejtett ?rm?re, ?s mag?hoz vette őket. De ut?na nagyon gyorsan t?vozott, mielőtt ?szrevehett?k volna, hogy valami hi?nyzik.

So you got so far correct:
Soon he/she found ... and ....

n?h?ny = some
elrejtett: comes from the verb elrejteni, and is an adjective (not "invisible" but maybe you can guess what it can mean, it's something similar)
?rm?re: comes from the noun ?rme (accusativ form of it)
mag?hoz: is a form of "maga"
vette: third person past tense of the verb venni
őket: akkusativ form of ők (it was correct in the automated translation )

See if these hints help you for the first sentence

[Lilliputt]

You beautiful alien, you Ok, gimme a sec... now lemme see...

EDIT: *After a LOT more hair pulling* Here is a new confusing suggestion, dear alien

Soon he/she found several hidden coins, and took them for him/herself. Then after leaving very quickly, before it would be dicovered, that there was something missing.

[Mistery]

You beautiful alien, you Ok, gimme a sec... now lemme see...

EDIT: *After a LOT more hair pulling* Here is a new confusing suggestion, dear alien

Soon he/she found several hidden coins, and took them for him/herself. Then after leaving very quickly, before it would be dicovered, that there was something missing.

It's not "then after leaving", it's "but then he/she left"

But the translation can be accepted

Good, job, well done

Your turn to make us

[Lilliputt]

It's not "then after leaving", it's "but then the/she left"

But the translation can be accepted

Good, job, well done

Your turn to make us

Oh, thaz nice considering I don't have so much hair left ta pull

This sentence is in swedish

Vik hädan berg och låt mig passera, röt den skälvande vågen mot klippans karga sten.

[Mistery]

Lol, I got

1st automated translation:
Bay h?dan mountain and tune me pass r?t the shaky Libra anti cutting barren stone.

2nd automated translation:
Fold h?dan mountains and tune me pass, roared the trembling balance against snip anticipating barren stone.

Well this seems to be double-babelfished Japanese mixed with butterflyish, carrot islanderish, batish, catish and dogish...

Okay, I'm just guessing, using a free interpreation

Just after I had passed by the mountain singing in a loud voice, it started to shake and big stones came down with a rumbling sound.

*Hides under the table*

[Lilliputt]

Lol, I got

1st automated translation:
Bay h?dan mountain and tune me pass r?t the shaky Libra anti cutting barren stone.

2nd automated translation:
Fold h?dan mountains and tune me pass, roared the trembling balance against snip anticipating barren stone.

Well this seems to be double-babelfished Japanese mixed with butterflyish, carrot islanderish, batish, catish and dogish...

Okay, I'm just guessing, using a free interpreation

Just after I had passed by the mountain singing in a loud voice, it started to shake and big stones came down with a rumbling sound.

*Hides under the table*

ROOOOOOOOOOFL!! This is not even close.
Mountain is right and stone is also right. The automatic translation also got roared right, but da rest is just

[SimplyCrazy]

Haha, isn't anybunny brave enough to take on swedish?

Just for fun I've put in an online translation:

Folds hädan mountains and tune me pass, roared the trembling balance against snip anticipating barren stone

[Bronwyn]

This sentence is in swedish

Vik h?dan berg och l?t mig passera, r?t den sk?lvande v?gen mot klippans karga sten.

Leave this mountain and let me pass, shouted the shaking(?) wave to the cliff's barren stone.