Learn Romanian: Proiectul are treizeci de săptămâni.

This is a special rule in Romanian! For numbers from 20 onwards (like treizeci), you must insert the preposition de between the number and what you are counting. For numbers under 20, you just put the number directly next to the noun, like trei săptămâni (three weeks).

How do you build a number like treizeci?

It translates literally to 'three tens'. It is made by combining trei (three) and zeci (the plural of zece, which means ten). Romanian uses this pattern for most multiples of ten, like 40 (patruzeci) or 50 (cincizeci).

Why does the sentence start with proiectul instead of proiect?

Proiect simply means 'project', while proiectul means 'the project'. In Romanian, the word for 'the' is attached to the end of the noun. Here, the suffix -ul is added to the neuter noun proiect.

How does the word for 'week' change here to become plural?

The singular word is săptămână (week). To make it plural to match the thirty weeks, the final -ă is dropped and replaced with -i, giving us săptămâni.