Garbage in, garbage out

[Khemehekis]

Garbage in, garbage out.

Kankonian:

KANO halas re*ev wibiwibiwub shil nananah
KANO shall-PRS translate wibiwibiwub as nananah
The KANO will translate "wibiwibiwub" as "na-na-na".

[Dormouse559]

Silvish speakers in the know would likely use the English acronym GIGO, approximating the English pronunciation with [ga.iˈgo].

For a more broadly understandable equivalent, there's this option:

Ereu a l' entrava, ereu a la sortuva.
[ʔəˈʁø ʔa.lɛ̃ˈtʁa.va | ʔəˈʁø ʔa.la.sɔˈty.va]
error at DEF entry | error at DEF-F.C exit
~Error in, error out


There are similar phrases that get more use outside computer science. They express the general concept that you can only expect results as good as the resources or effort that you put in. (Credit where it's due: The second is an actual proverb from the Aosta Valley.)

De maûjhen terre, rin ke de maûjhent' erba.
[de.mɑː.ʒɛ̃ˈtɛːʁ | ˈʁɛ̃ŋ ke.de.mɑː.ʒɛ̃ˈtɛʁ.ba]
from bad land-OBL | nothing CONJ PART bad grass-NOM
From bad land (come) only weeds.

Lo molin mou la farina k' on lui boutta.
[lɔmˈlɛ̃ŋ ˈmu la.faˈʁi.ŋa ko.ŋʎyˈbu.ta]
DEF-M.C mill grind.3S DEF-F.C flour-ACC REL.ACC PRO.NOM 3S.DAT put-3S
The mill grinds the flour you put in it.

[Khemehekis]

(Credit where it's due: The second is an actual proverb from the Aosta Valley.)

Cooooooool!

[Flavia]

The Cassiterians would also know the acronym, either adopting the English pronounciation as /gǽːjgɔ/ or pronouncing it like a native word "gigu" (o is normally replaced by u in older loanwords) /gíːgʊ/.
Varsur ántar, varsur ais.
garbage enter.3SG.PRS garbage exit.3SG.PRS
[vr̩ʷ.ˌsúː.rɔn.ˈtɔr vr̩ʷ.ˈsúː.ríːs]

[Iyionaku]

Yélian

Pucvenei iárorun, treinei iárorun.
[pʉkˈveːnɛɪ̯ ˈɪ̯aːɾɔ̈ɾʉn, ˈtɾɛɪ̯nɛɪ̯ ˈɪ̯aːɾɔ̈ɾʉn]
input-2SG nonsense, receive-2SG nonsense
You input nonsense, you receive nonsense.

Abbreviated:

PITI
[ˈpiːtɨ]

[Reyzadren]

griuskant (without script here)

hoezh zhaezi zhera burg.
/'hɯʒ 'ʒezi 'ʒəra 'burg/
model therefore-A then-V result

[prettydragoon]

Rireinutire

arena ata· arena sota:
/ˈɑɹenɑ ˈɑtɑ | ˈɑɹenɑ ˈsotɑ/
are-na a-ta | are-na so-ta ||
garbage-PTV give-INF | garbage-PTV get-INF ||
Garbage in, garbage out.

Translation challenge 42/100

[Fluffy8x]

ŋarâþ crîþ v9

vosteþ jas voscþens remu.
[vosteθ jas vosx͡θens ɹemu̜]
vosc-þeþ jas vosc-þens rem-u
nonsense-DAT.GC from nonsense-ACC.GC make-3GC
From nonsense, nonsense is made.

[Arayaz]

Old Laakitlantu

Qi kilut’an kip’angusiri tsasixanits’u tsamaawa’uratlu.
qi ki-lut’an ki-p’ang-u-si-ri tsa-sixa-ni-ts’u tsa-maawa-’u-ra-tlu
REL AGN-find AGN-see-IMPF-NEG-like 3.AN-err-PERF-IRR 3.AN-happen.often-IMPF-REAL-GNOM
"A blind scout often errs." or perhaps "A blind scout's erring happens often."

Translation challenge: 13%