• Create a new Web Chat component or edit an existing one
• Click menu Functionality Configuration in the Web Chat component setup screen
• Select property Custom Strings (I18n)

• Find the translation key values for your specific locale in the JSON

Example Custom Strings available in the widget:

{
    "en": {
        "agent": "Agent",
        "agentAbsentMessage": "The agent you were talking with is having connectivity problems. Please give us some time to resolve the problem.",
        "agentAttachmentDownloaded": "The agent has shared this file: {0} ({1} KB)",
        "agentAttachmentDownloading": "The agent is sending you an attachment, please wait...",
        "agentLeftChatMessage": "{0} has left the chat.",
        "agentMessage": "{0} says",
        "attachmentAudioFallback": "Your browser does not support embedded audio. However you can {0}download it{/0}.",
        "attachmentVideoFallback": "Your browser does not support embedded video. However you can {0}download it{/0}.",
        "attachment_audio": "Audio attachment",
        "attachment_file": "File attachment",
        "attachment_image": "Image attachment",
        "attachment_video": "Video attachment",
        "audioResponseOff": "Turn audio response on",
        "audioResponseOn": "Turn audio response off",
        "avatarAgent": "Agent icon",
        "avatarBot": "Bot icon",
        "avatarUser": "User icon",
        "card": "Card {0}",
        "cardImagePlaceholder": "Card image",
        "cardNavNext": "Next card",
        "cardNavPrevious": "Previous card",
        "chatTitle": "Chat",
        "clear": "Clear conversation",
        "clientGreetingAgent": "Hello, my name is {0}, how can I help you?",
        "clientGreetingBot": "Hello, I'm chatbot {0}, how can I help you?",
        "close": "Minimize widget",
        "closing": "Closing",
        "connected": "Connected",
        "connecting": "Connecting",
        "connectionFailureMessage": "Sorry, the assistant is unavailable right now. If the issue persists, contact your help desk.",
        "connectionRetryLabel": "Try Again",
        "defaultGreetingMessage": "Hey, Nice to meet you! Allow me a moment to get back to you.",
        "defaultSorryMessage": "I'm sorry. I can't get you the right content. Please try again.",
        "defaultWaitMessage": "I'm still working on your request. Thank you for your patience!",
        "disconnected": "Disconnected",
        "download": "Download",
        "editFieldErrorMessage": "Field input is invalid",
        "editFormErrorMessage": "Some of the fields need your attention",
        "endConversation": "End Conversation",
        "endConversationConfirmMessage": "Are you sure you want to end the conversation?",
        "endConversationDescription": "This will also clear your conversation history.",
        "errorSpeechInvalidUrl": "ODA URL for connection is not set. Please pass \"URI\" parameter during SDK initialization.",
        "errorSpeechMultipleConnection": "Another voice recognition is ongoing. Can't start a new one.",
        "errorSpeechTooMuchTimeout": "The voice message is too long to recognize and generate text.",
        "errorSpeechUnavailable": "To allow voice messaging, update your browser settings to enable access to your microphone.",
        "errorSpeechUnsupportedLocale": "The locale set for voice recognition is not supported. Please use a valid locale in \"speechLocale\" setting.",
        "holidayMessage": "It is currently a holiday.",
        "imageViewerClose": "Close image viewer",
        "imageViewerOpen": "Open image viewer",
        "inputPlaceholder": "Type a message",
        "itemIterator": "Item {0}",
        "languageSelectDropdown": "Select chat language",
        "language_ar": "Arabic",
        "language_de": "German",
        "language_detect": "Detect Language",
        "language_en": "English",
        "language_es": "Spanish",
        "language_fr": "French",
        "language_hi": "Hindi",
        "language_it": "Italian",
        "language_nl": "Dutch",
        "language_pt": "Portuguese",
        "launchButtonText": "Chat with me?",
        "linkField": "Click on the highlighted text to open Link for {0}",
        "locationSharedMessage": "The location has been shared: {0}, {1}",
        "networkWarningMessage": "Trying to recover from an unexpected network issue.",
        "noAgentsMessage": "There are no agents available to chat with you right now. Please try again later.",
        "noResultText": "No more results",
        "noSpeechTimeout": "The voice could not be detected to perform recognition.",
        "noText": "No",
        "offTheRecordOffButtonLabel": "Disable off the record",
        "offTheRecordOffMessage": "The following messages are recorded",
        "offTheRecordOnButtonLabel": "Enable off the record",
        "offTheRecordOnMessage": "The following messages are off the record",
        "openMap": "Open Map",
        "outOfHoursMessage": "You are currently trying to access a chat agent outside available chat hours. Please try again later.",
        "plfApplicationClassificationLabel": "Application classification",
        "plfAssigneeIdLabel": "Assignee",
        "plfBadEmailMessage": "Provide a valid email address",
        "plfBusinessUnitOrgIdLabel": "Business unit",
        "plfCancelChatLabel": "Cancel",
        "plfCategoryIdLabel": "Product Category",
        "plfChatPriorityLabel": "Chat priority",
        "plfContactIdLabel": "Contact",
        "plfEmailLabel": "Email",
        "plfFirstNameLabel": "First Name",
        "plfIncidentSeverityCodeLabel": "Incident severity",
        "plfIncidentTypeLabel": "Incident type",
        "plfInventoryItemIdLabel": "Inventory Item",
        "plfInventoryOrgIdLabel": "Inventory Organization",
        "plfLastNameLabel": "Last Name",
        "plfMissingLabel": "Add a label in i18n for this field",
        "plfNoLabel": "No",
        "plfOrganizationIdLabel": "Organization",
        "plfProductGroupIdLabel": "Product Group",
        "plfProductIdLabel": "Product",
        "plfQueueIdLabel": "Queue",
        "plfRequiredFieldMessage": "Provide a value for this field",
        "plfServiceRequestNumberLabel": "Service Request",
        "plfStartChatLabel": "Start Chat",
        "plfStripeCodeLabel": "Stripe code",
        "plfSubjectLabel": "Subject",
        "plfYesLabel": "Yes",
        "postConversationMessage": "Please take this survey to help us improve.",
        "postConversationMessageLinkButtonLabel": "Take Survey",
        "postConversationPrintButtonLabel": "Print Conversation",
        "previousChats": "End of previous conversation",
        "queueWaitMessage": "Queueing\nPosition in queue: {0}\nAverage wait time: {1}\nExpected wait time: {2}",
        "ratingStar": "Rate {0} star",
        "recognitionTextPlaceholder": "Speak your message",
        "relTimeDay": "{0}d ago",
        "relTimeHr": "{0}hr ago",
        "relTimeMin": "{0}min ago",
        "relTimeMoment": "A few seconds ago",
        "relTimeMon": "{0}mth ago",
        "relTimeNow": "Now",
        "relTimeYr": "{0}yr ago",
        "requestLocation": "Requesting location",
        "requestLocationDeniedPermission": "To allow sharing your location, update your browser settings to enable access to your location. You can also type in the location instead.",
        "requestLocationDeniedTimeout": "It is taking too long to get your location. Please try sharing it again, or else type it in.",
        "requestLocationDeniedUnavailable": "Your current location is unavailable. Please try sharing it again, or else type it in.",
        "retryMessage": "Try again",
        "send": "Send message",
        "sensitiveInformationMessage": "The following message is send off the record because sensitive data is found in it",
        "sessionEndedAbnormallyMessage": "Something went wrong and this conversation has ended.",
        "sessionEndedByAgentConcludedMessage": "The agent has concluded this conversation.",
        "sessionEndedByTimeoutMessage": "This conversation has timed out.",
        "sessionEndedMessage": "This conversation has ended.",
        "shareAudio": "Share Audio",
        "shareFailureMessage": "Sorry, sharing is not available on this device.",
        "shareFile": "Share File",
        "shareLocation": "Share Location",
        "shareVisual": "Share Image/Video",
        "showOptions": "Show Options",
        "skillMessage": "Skill says",
        "speak": "Speak a message",
        "splitTextLessButtonLabel": "Show less",
        "splitTextMoreButtonLabel": "Show more",
        "systemPostConversationCloseButtonLabel": "Minimize Widget",
        "systemPostConversationMessage": "Do you want to start a new conversation?",
        "systemPostConversationStartButtonLabel": "Start New Conversation",
        "typingIndicator": "Waiting for response",
        "upload": "Share popup",
        "uploadFailed": "Upload Failed.",
        "uploadFileSizeLimitExceeded": "File size should not be more than {0}MB.",
        "uploadFileSizeZeroByte": "Files of size zero bytes can't be uploaded.",
        "uploadUnsupportedFileType": "Unsupported file type.",
        "userMessage": "I say",
        "utteranceGeneric": "Message from skill.",
        "webViewAccessibilityTitle": "In-widget WebView to display links",
        "webViewClose": "Done",
        "webViewErrorInfoDismiss": "Dismiss",
        "webViewErrorInfoText": "Don't see the page? {0}Click here{/0} to open it in a browser.",
        "yesText": "Yes"
    }
}