Languages

Well, since this is my field I'm giving a littel contribution. The suffix "super-" came from the latin "Super", which has a double meaning: it can be used as a locative or as a superlative.

- As a locative the worls means "above" or "over"

- Otherwise the world is a superlative

These meanings haven't passed in all the present languages, for example in spanish the locative value is almost completly disappeared replaced by the word "sobra", which came from the same root.

Moreover in certain languages (italian for example) the translation is considered not always necessary.

Anyway the most likely translation of Supergirl are:

- French: Superfemme (actually this is the translation of Superwoman, but the French translation for "Girl" are quite awkward)
- Spanish: Superchica
- Italian: Super-ragazza (otherwise is also possible to keep it as it is, since in Italy many superheroes' names, including Superman and Supergirl, remain untranslated)
- German: Übermädchen (a fine translation)
- Russian: превосхо́дный-де́вушка (a very approximative translation, I haven't practiced my russian since I left my college course 6 years ago, keep in mind that in Russia, Superman is called Супермен, which is just the transliteration of his name in Cyrillic)