Although vs. However:
Hasonlóak (habár), mégis mások
Although = annak ellenére, hogy
However = de
Így helyes a használatuk:
Although the weather was cold, we decided not to wear our jackets.
We decided not to wear our jackets. However, the weather was cold.
Így viszont HIBÁS!
We decided not to wear our jackets. Although, it was rather cold.