Final answer:
In the Spanish language, the acute accent is mainly used on vowel letters to indicate stress or emphasis.
Step-by-step explanation:
In the Spanish language, the acute accent is mainly used on vowel letters. The acute accent, which looks like a forward-slash (/) and is denoted by a diagonal line going from the bottom-left to the top-right of the vowel, is used to indicate the stress or emphasis on a particular syllable in a word. It is commonly seen on vowels like á, é, í, ó, and ú. For example, the word tú (meaning 'you') has an acute accent on the letter ú to indicate the stress on that syllable.
Learn more about Accent marks in the Spanish language