[Translation][ES] Claim: Spanish translation for missing levels (30-40)

[JulianColoma]

Hi! I would like to contribute by translating the missing levels into Spanish (from level 30 to 40).

Since the Spanish language is already supported, I will focus on:

1. Translating level descriptions under client/src/gamedata/es/descriptions/levels/.
2. Checking if any new keys need to be added to es/strings.json.

I'll be submitting PRs in small batches to facilitate the review. Thanks!

[heeklb6]

Make sure to also verify if the level-specific vocabulary in client/src/gamedata/es/descriptions/levels/ aligns with the existing keys in es/strings.json to prevent potential key-not-found errors during runtime. Does your translation strategy include updating the fallback logic in the localization loader if these new levels introduce any unique string interpolation requirements?

[melina-karleen]

To ensure consistency with the existing localization schema, are you planning to use a script to validate that all new keys in es/strings.json are properly indexed by the i18n loader before submitting the first batch? Please confirm if you intend to add a unit test that specifically checks for missing keys in the client/src/gamedata/es/ directory to catch runtime errors during the build process.

[JulianColoma]

Hi @heeklb6 and @melina-karleen! I've opened a new PR here: OpenZeppelin/ethernaut/pull/860. It includes the Spanish translations for levels 30-40, a new unit test to validate that all specific vocabulary keys in client/src/gamedata/es/ are properly indexed in es/strings.json, and the necessary updates to the fallback logic in the localization loader to handle string interpolation. Let me know if any further changes are needed!