Learn Romanian: Băiatul cumpără o mașină nouă în aprilie.

In Romanian, the word for "the" (the definite article) is attached to the end of the noun rather than being a separate word in front of it. The base word is băiat (boy), and adding -ul to the end makes it băiatul (the boy).

Why is the adjective nouă placed after the noun mașină?

In Romanian, descriptive adjectives usually come after the noun they describe. So, instead of saying "a new car", the structure is o mașină nouă (literally: a car new).

I thought nouă meant the number nine. Why is it used here?

The word nouă translates to both the number nine and the feminine form of "new". The default masculine word for "new" is nou. Because mașină is a feminine noun, the adjective has to match it, changing from nou to nouă.

Why is the month aprilie written with a lowercase letter?

Unlike in English, months of the year and days of the week are not capitalized in Romanian unless they are the first word of a sentence.