form recognizer mistranslation when processing multiple documents

Question

i am testing a simple logic app that translates multiple files into english. when I run one file through it, it is very good quality but when i run multiple files the translation is absolutely trash. The test file I am using is a UN paper so I can compare the quality of the translations; original, good, trash. This is my logic app code

{
    "definition": {
        "$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
        "actions": {
            "For_each": {
                "type": "Foreach",
                "foreach": "@body('Lists_blobs_(V2)')?['value']",
                "actions": {
                    "Check_if_PDF": {
                        "type": "If",
                        "expression": {
                            "and": [
                                {
                                    "equals": [
                                        "@items('For_each')?['MediaType']",
                                        "application/pdf"
                                    ]
                                }
                            ]
                        },
                        "actions": {
                            "Start_document_translation": {
                                "type": "ApiConnection",
                                "inputs": {
                                    "host": {
                                        "connection": {
                                            "referenceName": "microsofttranslatorv"
                                        }
                                    },
                                    "method": "post",
                                    "body": {
                                        "storageType": "Folder",
                                        "sourceURL": "https://equablobmain.blob.core.windows.net/test-translate-arabic?si=test-translate&spr=https&sv=2022-11-02&sr=c&sig=%2BrZRDITWB%2BxjCbIp2XezHIR7xWpYajxg7IEWbpjDECU%3D",
                                        "targetContainerURL": "https://equablobmain.blob.core.windows.net/test-translate-en?si=test-translate&spr=https&sv=2022-11-02&sr=c&sig=L9IZV7HhJ4CB27bZWbff0Vk1%2FUc5ZAqVgR38OYoIs2A%3D",
                                        "targetLanguage": "en",
                                        "sourceLanguage": "ar"
                                    },
                                    "headers": {
                                        "Content-Type": "application/json"
                                    },
                                    "path": "/translator/text/batch/v1.1/batches/"
                                },
                                "runAfter": {
                                    "Analyze_Layout": [
                                        "SUCCEEDED"
                                    ]
                                }
                            },
                            "Analyze_Layout": {
                                "type": "ApiConnection",
                                "inputs": {
                                    "host": {
                                        "connection": {
                                            "referenceName": "formrecognizer"
                                        }
                                    },
                                    "method": "post",
                                    "headers": {
                                        "inputFileUrl": "@concat('https://equablobmain.blob.core.windows.net/test-translate-arabic/', items('For_each')?['Name'], '?sp=rl&st=2025-01-25T18:53:32Z&se=2025-01-30T02:53:32Z&spr=https&sv=2022-11-02&sr=c&sig=Xnh5XK1WWmvahq%2BsyrLKFl8BBLLTjbAIhP1v6QIg%2FWE%3D')",
                                        "Content-Type": "application/json"
                                    },
                                    "path": "/v2.1/layout/analyze"
                                }
                            }
                        },
                        "else": {
                            "actions": {
                                "Start_document_translation_1": {
                                    "type": "ApiConnection",
                                    "inputs": {
                                        "host": {
                                            "connection": {
                                                "referenceName": "microsofttranslatorv"
                                            }
                                        },
                                        "method": "post",
                                        "body": {
                                            "storageType": "Folder",
                                            "sourceURL": "https://equablobmain.blob.core.windows.net/test-translate-arabic?si=test-translate&spr=https&sv=2022-11-02&sr=c&sig=%2BrZRDITWB%2BxjCbIp2XezHIR7xWpYajxg7IEWbpjDECU%3D",
                                            "targetContainerURL": "https://equablobmain.blob.core.windows.net/test-translate-en?si=test-translate&spr=https&sv=2022-11-02&sr=c&sig=L9IZV7HhJ4CB27bZWbff0Vk1%2FUc5ZAqVgR38OYoIs2A%3D",
                                            "targetLanguage": "en",
                                            "sourceLanguage": "ar"
                                        },
                                        "headers": {
                                            "Content-Type": "application/json"
                                        },
                                        "path": "/translator/text/batch/v1.1/batches/"
                                    }
                                }
                            }
                        }
                    }
                },
                "runAfter": {
                    "Lists_blobs_(V2)": [
                        "Succeeded"
                    ]
                }
            },
            "Lists_blobs_(V2)": {
                "type": "ApiConnection",
                "inputs": {
                    "host": {
                        "connection": {
                            "referenceName": "azureblob"
                        }
                    },
                    "method": "get",
                    "path": "/v2/datasets/@{encodeURIComponent(encodeURIComponent('AccountNameFromSettings'))}/foldersV2/@{encodeURIComponent(encodeURIComponent('test-translate-arabic'))}"
                },
                "runAfter": {},
                "metadata": {
                    "JTJmdGVzdC10cmFuc2xhdGUtYXJhYmlj": "/test-translate-arabic"
                }
            }
        },
        "contentVersion": "1.0.0.0",
        "outputs": {},
        "triggers": {
            "When_a_blob_is_added_or_updated": {
                "type": "ServiceProvider",
                "inputs": {
                    "parameters": {
                        "path": "https://equablobmain.blob.core.windows.net/test-translate-arabic"
                    },
                    "serviceProviderConfiguration": {
                        "connectionName": "AzureBlob-1",
                        "operationId": "whenABlobIsAddedOrModified",
                        "serviceProviderId": "/serviceProviders/AzureBlob"
                    }
                }
            }
        }
    },
    "kind": "Stateful"
}

Answer 1

Hi @Srikant Naidu ,

I apologize for any inconvenience caused.

Based on the information you provided, it seems that the quality of translations is significantly worse when processing multiple files compared to when processing a single file. You have also mentioned that you have tried implementing a time delay in the logic app workflow to address this issue, but it did not resolve the problem.

Regarding your question, when processing multiple documents, the Document Translator API is attempting to translate the original PDF files, not the output of the Form Recognizer (Analyze Layout) node.

• It is possible that when multiple files are processed together, the Form Recognizer may not fully analyze each document before passing it to the Translator API, causing the quality degradation. Despite adding an Until node to ensure the Form Recognizer step completes successfully (status = 'Succeeded'), the issue persists.
• To improve translation consistency when processing multiple files, you may want to consider breaking down the process into smaller batches and processing them separately. This will allow the Form Recognizer to fully analyze each document before passing it to the Translator API, potentially improving the quality of translations.
• Additionally, you may want to review the settings and configurations of your Azure AI Document Intelligence, Azure AI Translator, and Logic Apps plans to ensure that they are optimized for your use case.

Also, for your better understanding, please refer to the following documentations:

• Azure AI Translator Document Translation: FAQ
• Overview of document translation in Microsoft Syntex
• What is Document Translation?

I hope this information helps! Let me know if you have any further questions.