Written Romanian
The oldest written text in Romanian is a letter from 1521 ("Neacşu of Câmpulung's letter"). It is written using the Cyrillic alphabet, like all early Romanian writings (because the usual language for
religious services was old Slavonian).
In the late 1700s, Transylvanian scholars started using the Latin alphabet to write Romanian. The Cyrillic alphabet remained in (gradually decreasing) use until 1860, when Romanian writing was first officially regulated.
The Romanian alphabet is based on the Latin alphabet, and has five additional letters (these are not diacriticals, but letters in their own right).
Initially, there were as many as 12 additional letters, but some of them disappeared in subsequent reforms. Also, until the early 20th century, a short vowel marker was used.
Today, the Romanian alphabet is largely phonetic, with one exception: the "â" (used inside the words) and "î" (used at the beginning or the end), both representing the same sound. Long and short vowels are not distinguished in writing. Usually, the sounds denoted by letters are similar to Italian.
Here are the letters of the Romanian alphabet, and their pronunciation.