Sims 4 Language Strings -

If the mod updates, the translator starts over. This is why 90% of mods are English-only.

The game engine does not "know" English, Spanish, or Japanese. Instead, it uses a system of numerical keys. When your Sim performs an interaction, the game engine looks up a specific hexadecimal key. It then cross-references that key with the specific language file your game is set to (e.g., English) and displays the corresponding text. sims 4 language strings