Questions & Answers about Mi hermano estudia alemán.
Why is the verb estudia instead of estudiar or estudio?
Why isn't alemán capitalized like the word German is in English?
Why does alemán have an accent mark?
The written accent tells you to emphasize that last syllable when speaking (ah-leh-MAHN). Without the accent mark, the standard rules of Spanish pronunciation would make you stress the middle syllable, which would sound incorrect.
If a sister was studying, would it be "Mi hermana estudia alemana"?
No, the name of the language itself doesn't change based on who is speaking or studying it. It would still be Mi hermana estudia alemán. You would only use the feminine word alemana if you were describing a German female, like una mujer alemana.