We use 'although' to show contrast.
Although: Walaupun
Since: Disebabkan
Since: Disebabkan
Examples:
-Although he was married,King Sam did not have any children.
-Although John was poor,he led a very happy life.
-Although the old man was sick,he painted the portrait of the king.
We use 'since' to express cause and effect.
Examples:
-Since King Sam did not have children,he decided to find an heir to his throne.
-Since the people in the kingdom wanted to be the heir,they started painting immediately.
-Since the king was not happy with his people's work of art,he asked them to leave the palace.
Do not add 'but' in the sentence that has the conjuction 'although'.
Exmple:
-Although the woman is old,but she has a lot of energy. (Wrong)
-Although the woman is old,she has a lot of energy. (True)