As a total war enjoyer, some comments:
1. neither the xiphos nor the kopis has such a broad blade; greek blades are more simply curved and generally do not look like that, and do not have such a complex hilt.
2. while Athena may be one of the patrons of Sparta, her image (and especially owl symbol) is likely more closely associated with Athens. I am also not sure whether greek shield art usually comes in that style.
3. I generally think it is inadvisable to conflate the movie Sparta with actual Sparta - while the latter is depicted historically, the former may not be.
4. Probably better to have Greek than English on novelties, if any at all.