Why AiBuilder Document processing is limited to only few languages? Why can't we train our model with different regional language documents? May be in future they'll include?
Are you referring to AI Builder document processing for structured documents? If yes it supports 70+ languages. Any language you would like to see as well? Requirements and limitations for document processing models - AI Builder | Microsoft Docs
Are you referring to the custom Document Processing model or the pre-built Invoice Processing model?
If you use the custom Document Processing model (Overview of document processing model - AI Builder | Microsoft Docs), you need to build your own model and provide documents for training (could be invoices or other types of structured forms). If the language of your documents is supported (see this list: Requirements and limitations for document processing models - AI Builder | Microsoft Docs), then your model will be configured to predict on documents that have the same layout/language than the ones you used for training. You don't need to specify any language in the flow calling the model.
If you use the prebuilt Invoice Processing (Invoice processing prebuilt AI model - AI Builder | Microsoft Docs) model then you are using a standard model that doesn't require any training but will only recognize simple English (US) invoices.
We are using custom Document processing model to build our own model for different languages , Is it possible for any other languages can get the high accuracy results as we got for English (mentioning only for custom models )?