The English nickname for a Sagittarius girl is "Archeress".

Sagittarius girls are known for their adventurous, independent, and free-spirited nature. They are curious, optimistic, and always ready for a new challenge. They value their freedom and independence and often have a strong desire to explore new places and ideas. Sagittarius girls are also known for their honesty and straightforwardness, which can sometimes come across as blunt or tactless.

As for the nickname "Archeress", it comes from the symbol of the Sagittarius sign, which is a centaur holding a bow and arrow. The centaur represents the duality of the Sagittarius personality, as they are both intellectual and wild, while the bow and arrow represent their love for adventure and exploration. The nickname "Archeress" highlights the Sagittarius girl's adventurous spirit and love for exploration, and it has a strong, powerful and confident ring to it.

Other possible English nicknames for a Sagittarius girl include "Wanderlust", "Adventure Seeker", "Explorer", "Free Spirit", "Trailblazer", and "Optimist". These nicknames all capture different aspects of the Sagittarius girl's personality, such as her love for travel, her optimism, and her independent spirit.

In conclusion, whether it's "Archeress" or another nickname, a Sagittarius girl is someone who loves adventure, seeks new experiences, and values her freedom and independence above all else. Her dynamic personality and bold outlook on life make her a force to be reckoned with, and her English nickname should reflect that.