fix: internationalize hardcoded error messages

- Added new error message keys to English locale files (tools.json and common.json)
- Replaced hardcoded 'Roo tried to use' messages with i18n calls
- Replaced other hardcoded error messages in say('error') calls
- Updated test mocks to handle new i18n keys
- Affected files:
  - Task.ts: Lines 1058, 2140
  - writeToFileTool.ts: Line 148
  - askFollowupQuestionTool.ts: Line 51
  - applyDiffTool.ts: Line 86
  - searchAndReplaceTool.ts: Lines 140, 159
  - insertContentTool.ts: Line 90
  - presentAssistantMessage.ts: Line 318
  - useMcpToolTool.spec.ts: Test mock update

This change ensures all error messages can be properly translated to the 17+ languages supported by Roo Code.

src/core/assistant-message/presentAssistantMessage.ts

@@ -35,6 +35,7 @@ import { Task } from "../task/Task"
 import { codebaseSearchTool } from "../tools/codebaseSearchTool"
 import { experiments, EXPERIMENT_IDS } from "../../shared/experiments"
 import { applyDiffToolLegacy } from "../tools/applyDiffTool"
+import { t } from "../../i18n"
 
 /**
  * Processes and presents assistant message content to the user interface.
@@ -316,7 +317,10 @@ export async function presentAssistantMessage(cline: Task) {
 
 				await cline.say(
 					"error",
-					`Error ${action}:\n${error.message ?? JSON.stringify(serializeError(error), null, 2)}`,
+					t("tools:errors.toolExecutionError", {
+						action,
+						error: error.message ?? JSON.stringify(serializeError(error), null, 2),
+					}),
 				)
 
 				pushToolResult(formatResponse.toolError(errorString))

src/core/task/Task.ts

@@ -1053,12 +1053,17 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 	}
 
 	async sayAndCreateMissingParamError(toolName: ToolName, paramName: string, relPath?: string) {
-		await this.say(
-			"error",
-			`Roo tried to use ${toolName}${
-				relPath ? ` for '${relPath.toPosix()}'` : ""
-			} without value for required parameter '${paramName}'. Retrying...`,
-		)
+		const errorMessage = relPath
+			? t("tools:errors.missingRequiredParameter.withPath", {
+					toolName,
+					relPath: relPath.toPosix(),
+					paramName,
+				})
+			: t("tools:errors.missingRequiredParameter.withoutPath", {
+					toolName,
+					paramName,
+				})
+		await this.say("error", errorMessage)
 		return formatResponse.toolError(formatResponse.missingToolParameterError(paramName))
 	}
 
@@ -2135,10 +2140,7 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 					// If there's no assistant_responses, that means we got no text
 					// or tool_use content blocks from API which we should assume is
 					// an error.
-					await this.say(
-						"error",
-						"Unexpected API Response: The language model did not provide any assistant messages. This may indicate an issue with the API or the model's output.",
-					)
+					await this.say("error", t("common:errors.unexpectedApiResponse"))
 
 					await this.addToApiConversationHistory({
 						role: "assistant",

src/core/tools/__tests__/useMcpToolTool.spec.ts

@@ -15,6 +15,13 @@ vi.mock("../../prompts/responses", () => ({
 
 vi.mock("../../../i18n", () => ({
 	t: vi.fn((key: string, params?: any) => {
+		// Handle the new tools error messages
+		if (key === "tools:errors.missingRequiredParameter.withPath" && params) {
+			return `Roo tried to use ${params.toolName} for '${params.relPath}' without value for required parameter '${params.paramName}'. Retrying...`
+		}
+		if (key === "tools:errors.missingRequiredParameter.withoutPath" && params) {
+			return `Roo tried to use ${params.toolName} without value for required parameter '${params.paramName}'. Retrying...`
+		}
 		if (key === "mcp:errors.invalidJsonArgument" && params?.toolName) {
 			return `Roo tried to use ${params.toolName} with an invalid JSON argument. Retrying...`
 		}

src/core/tools/applyDiffTool.ts

@@ -13,6 +13,7 @@ import { fileExistsAtPath } from "../../utils/fs"
 import { RecordSource } from "../context-tracking/FileContextTrackerTypes"
 import { unescapeHtmlEntities } from "../../utils/text-normalization"
 import { EXPERIMENT_IDS, experiments } from "../../shared/experiments"
+import { t } from "../../i18n"
 
 export async function applyDiffToolLegacy(
 	cline: Task,
@@ -82,7 +83,7 @@ export async function applyDiffToolLegacy(
 			if (!fileExists) {
 				cline.consecutiveMistakeCount++
 				cline.recordToolError("apply_diff")
-				const formattedError = `File does not exist at path: ${absolutePath}\n\n<error_details>\nThe specified file could not be found. Please verify the file path and try again.\n</error_details>`
+				const formattedError = t("tools:errors.fileNotFound", { path: absolutePath })
 				await cline.say("error", formattedError)
 				pushToolResult(formattedError)
 				return

src/core/tools/askFollowupQuestionTool.ts

@@ -2,6 +2,7 @@ import { Task } from "../task/Task"
 import { ToolUse, AskApproval, HandleError, PushToolResult, RemoveClosingTag } from "../../shared/tools"
 import { formatResponse } from "../prompts/responses"
 import { parseXml } from "../../utils/xml"
+import { t } from "../../i18n"
 
 export async function askFollowupQuestionTool(
 	cline: Task,
@@ -48,7 +49,7 @@ export async function askFollowupQuestionTool(
 				} catch (error) {
 					cline.consecutiveMistakeCount++
 					cline.recordToolError("ask_followup_question")
-					await cline.say("error", `Failed to parse operations: ${error.message}`)
+					await cline.say("error", t("tools:errors.parseOperationsFailed", { error: error.message }))
 					pushToolResult(formatResponse.toolError("Invalid operations xml format"))
 					return
 				}

src/core/tools/insertContentTool.ts

@@ -12,6 +12,7 @@ import { fileExistsAtPath } from "../../utils/fs"
 import { insertGroups } from "../diff/insert-groups"
 import { DEFAULT_WRITE_DELAY_MS } from "@roo-code/types"
 import { EXPERIMENT_IDS, experiments } from "../../shared/experiments"
+import { t } from "../../i18n"
 
 export async function insertContentTool(
 	cline: Task,
@@ -86,7 +87,7 @@ export async function insertContentTool(
 			if (lineNumber > 1) {
 				cline.consecutiveMistakeCount++
 				cline.recordToolError("insert_content")
-				const formattedError = `Cannot insert content at line ${lineNumber} into a non-existent file. For new files, 'line' must be 0 (to append) or 1 (to insert at the beginning).`
+				const formattedError = t("tools:errors.insertContentNewFile", { lineNumber })
 				await cline.say("error", formattedError)
 				pushToolResult(formattedError)
 				return

src/core/tools/searchAndReplaceTool.ts

@@ -13,6 +13,7 @@ import { fileExistsAtPath } from "../../utils/fs"
 import { RecordSource } from "../context-tracking/FileContextTrackerTypes"
 import { DEFAULT_WRITE_DELAY_MS } from "@roo-code/types"
 import { EXPERIMENT_IDS, experiments } from "../../shared/experiments"
+import { t } from "../../i18n"
 
 /**
  * Tool for performing search and replace operations on files
@@ -135,7 +136,7 @@ export async function searchAndReplaceTool(
 			cline.consecutiveMistakeCount++
 			cline.recordToolError("search_and_replace")
 			const formattedError = formatResponse.toolError(
-				`File does not exist at path: ${absolutePath}\nThe specified file could not be found. Please verify the file path and try again.`,
+				t("tools:errors.fileNotFoundSimple", { path: absolutePath }),
 			)
 			await cline.say("error", formattedError)
 			pushToolResult(formattedError)
@@ -152,9 +153,10 @@ export async function searchAndReplaceTool(
 		} catch (error) {
 			cline.consecutiveMistakeCount++
 			cline.recordToolError("search_and_replace")
-			const errorMessage = `Error reading file: ${absolutePath}\nFailed to read the file content: ${
-				error instanceof Error ? error.message : String(error)
-			}\nPlease verify file permissions and try again.`
+			const errorMessage = t("tools:errors.fileReadError", {
+				path: absolutePath,
+				error: error instanceof Error ? error.message : String(error),
+			})
 			const formattedError = formatResponse.toolError(errorMessage)
 			await cline.say("error", formattedError)
 			pushToolResult(formattedError)

src/core/tools/writeToFileTool.ts

@@ -16,6 +16,7 @@ import { detectCodeOmission } from "../../integrations/editor/detect-omission"
 import { unescapeHtmlEntities } from "../../utils/text-normalization"
 import { DEFAULT_WRITE_DELAY_MS } from "@roo-code/types"
 import { EXPERIMENT_IDS, experiments } from "../../shared/experiments"
+import { t } from "../../i18n"
 
 export async function writeToFileTool(
 	cline: Task,
@@ -145,9 +146,10 @@ export async function writeToFileTool(
 				// Use more specific error message for line_count that provides guidance based on the situation
 				await cline.say(
 					"error",
-					`Roo tried to use write_to_file${
-						relPath ? ` for '${relPath.toPosix()}'` : ""
-					} but the required parameter 'line_count' was missing or truncated after ${actualLineCount} lines of content were written. Retrying...`,
+					t("tools:errors.lineCountMissing", {
+						relPath: relPath ? ` for '${relPath.toPosix()}'` : "",
+						actualLineCount,
+					}),
 				)
 
 				pushToolResult(

src/i18n/locales/en/common.json

@@ -103,7 +103,8 @@
 		},
 		"roo": {
 			"authenticationRequired": "Roo provider requires cloud authentication. Please sign in to Roo Code Cloud."
-		}
+		},
+		"unexpectedApiResponse": "Unexpected API Response: The language model did not provide any assistant messages. This may indicate an issue with the API or the model's output."
 	},
 	"warnings": {
 		"no_terminal_content": "No terminal content selected",

src/i18n/locales/en/tools.json

@@ -14,5 +14,18 @@
 		"errors": {
 			"policy_restriction": "Failed to create new task due to policy restrictions."
 		}
+	},
+	"errors": {
+		"missingRequiredParameter": {
+			"withPath": "Roo tried to use {{toolName}} for '{{relPath}}' without value for required parameter '{{paramName}}'. Retrying...",
+			"withoutPath": "Roo tried to use {{toolName}} without value for required parameter '{{paramName}}'. Retrying..."
+		},
+		"lineCountMissing": "Roo tried to use write_to_file{{relPath}} but the required parameter 'line_count' was missing or truncated after {{actualLineCount}} lines of content were written. Retrying...",
+		"parseOperationsFailed": "Failed to parse operations: {{error}}",
+		"fileNotFound": "File does not exist at path: {{path}}\n\n<error_details>\nThe specified file could not be found. Please verify the file path and try again.\n</error_details>",
+		"fileNotFoundSimple": "File does not exist at path: {{path}}\nThe specified file could not be found. Please verify the file path and try again.",
+		"fileReadError": "Error reading file: {{path}}\nFailed to read the file content: {{error}}\nPlease verify file permissions and try again.",
+		"insertContentNewFile": "Cannot insert content at line {{lineNumber}} into a non-existent file. For new files, 'line' must be 0 (to append) or 1 (to insert at the beginning).",
+		"toolExecutionError": "Error {{action}}:\n{{error}}"
 	}
 }