Update codebase search description to emphasize English query require…

src/core/prompts/tools/codebase-search.ts

@@ -1,6 +1,6 @@
 export function getCodebaseSearchDescription(): string {
 	return `## codebase_search
-Description: Find files most relevant to the search query.\nThis is a semantic search tool, so the query should ask for something semantically matching what is needed.\nIf it makes sense to only search in a particular directory, please specify it in the path parameter.\nUnless there is a clear reason to use your own search query, please just reuse the user's exact query with their wording.\nTheir exact wording/phrasing can often be helpful for the semantic search query. Keeping the same exact question format can also be helpful.
+Description: Find files most relevant to the search query.\nThis is a semantic search tool, so the query should ask for something semantically matching what is needed.\nIf it makes sense to only search in a particular directory, please specify it in the path parameter.\nUnless there is a clear reason to use your own search query, please just reuse the user's exact query with their wording.\nTheir exact wording/phrasing can often be helpful for the semantic search query. Keeping the same exact question format can also be helpful.\nIMPORTANT: Queries MUST be in English. Translate non-English queries before searching.
 Parameters:
 - query: (required) The search query to find relevant code. You should reuse the user's exact query/most recent message with their wording unless there is a clear reason not to.
 - path: (optional) The path to the directory to search in relative to the current working directory. This parameter should only be a directory path, file paths are not supported. Defaults to the current working directory.