[Feature Request] Add language configuration for companion (Silt/buddy)

Bug Description
Companion (Silt/buddy) language configuration - please add a setting to change the companion's language (e.g., Korean). Currently it only supports English.

Environment Info

• Platform: win32
• Terminal: cursor
• Version: 2.1.92
• Feedback ID: d137f43c-965a-4f53-aa36-fb8e74244707

Errors

[{"error":"MaxFileReadTokenExceededError: File content (13951 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n    at T5_ (B:/~BUN/root/src/entrypoints/cli.js:4345:13363)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-06T14:29:43.786Z"}]