Updates multiple Translation Attribute objects given its keys. For this operation you can either send array of JSON objects as specified in the example or you can also upload Excel XLSX file (MIME type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet). Before uploading perform the export operation, edit Excel file accordingly and then upload it back. Please be sure to specify the Content-Type header as multipart/form-data, the Content-Length headers with the correct data size and the Content-Disposition header as attachment; filename=some_name.xlsx. The body of the request must be a form-data body with the key file and value -- base64 encoded string of the binary content. Excel file which you import should have exactly the same structure as the exported file earlier, you can only modify there value and comment columns on the Attributes sheet. CURL example: curl -L -X PUT https://../public/v1/localization/{translation_id}/attributes -H "Authorization: ApiKey ...:..." -H "Content-Disposition: attachment; filename=some_name.xlsx" --form file=@"/path/to/file/file.xlsx"