"They eat cake."
Translation:Onlar pasta yerler.
"They eat cake." - Onlar pasta yerler.
Your question is not stupid & is a valid Turkish grammar question.
The plural suffixes in Turkish -lar & -ler.
We use the rules of Major Vowel Harmony to decide which suffix to use.
Words whose last vowel is one of (a, ı, o, u) will get -lar added to it, while those whose last vowel is one of (e, i, ö, ü) will be followed by -ler.
The use of plurals.
The plural suffix is added to indicate plurality. If plurality is shown by a numeral greater than one or a word like “çok” (many), or “kaç” (how many), no plural suffix is added to the noun.
Dört armut - Four pears. The Turkish (noun) “armut” remains singular.
“Bankadan geliyorlar.” Last vowel “-o” use –lar. They are coming from the bank.
“Ofiste yumurta yiyorlar.” Last vowel “-o” use –lar. They are eating eggs in the office.
“Ördekler elma yer.” Last vowel “-e” use ler. The ducks eat apples. The noun is singular in the Turkish question & plural in the English answer.