I am a world-renowned "symbol". In the English language, if I'm added to a noun, it turns to an adjective (in most cases).
If you put horizontal lines through me, I become a currency, but it is not used in many countries.
In Spanish, I am a "symbol", but also I am a word. I am used to connect words and phrases. If you watch your School House Rock, I go along with a junction.
What am I?