Hello,
“Tesseract OCR: Error performing OCR: InvalidInputLanguage”
How can I fix this?
Hi @Samira_Rahme
Can you check this page?
The UiPath Documentation Portal - the home of all our valuable information. Find here everything you need to guide you in your automation journey in the UiPath ecosystem, from complex installation guides to quick tutorials, to practical business...
Hope this helps.
Jon_Smith
October 6, 2025, 12:58pm
3
Thats indeed strange.
Seems the help link on the activity is broken, but the UiPath Documentation is here
The UiPath Documentation Portal - the home of all our valuable information. Find here everything you need to guide you in your automation journey in the UiPath ecosystem, from complex installation guides to quick tutorials, to practical business...
Links to a Github for the languages supported
TESSERACT(1)
============
:doctype: manpage
NAME
----
tesseract - command-line OCR engine
SYNOPSIS
--------
*tesseract* 'FILE' 'OUTPUTBASE' ['OPTIONS']... ['CONFIGFILE']...
DESCRIPTION
-----------
tesseract(1) is a commercial quality OCR engine originally developed at HP
between 1985 and 1995. In 1995, this engine was among the top 3 evaluated by
UNLV. It was open-sourced by HP and UNLV in 2005, and has been developed
at Google until 2018.
show original
‘ara’ seems valid.
Yoichi
October 6, 2025, 12:59pm
4
Hi,
The following will help you.
The UiPath Documentation Portal - the home of all our valuable information. Find here everything you need to guide you in your automation journey in the UiPath ecosystem, from complex installation guides to quick tutorials, to practical business...
Hi,
Do you use CommunityEdition? If so, can you try the following step?
Windows project
First, create folder tessdata under c:\Users[AccountName]\AppData\Local\Programs\UiPath\Studio if it doesn’t exist.
Then put ara.traineddata file to the tessdata folder.
Finally, restart your Studio.
Windows Legacy project
First, create folder tessdata under c:\Users[AccountName]\AppData\Local\Programs\UiPath\Studio\net461 if it doesn’t exist.
Then put ara.traineddata file to the tessdata folder.
Fi…
Regards,
Hi @Samira_Rahme ,
You have to check if the arabic language is added to Tesseract :
Go to C:\Program Files (x86)\Tesseract-OCR\tessdata
Check if the file “ara.traineddata” is present in the folder
If it doesn’t, download it from the official repository: GitHub - tesseract-ocr/tessdata: Trained models with fast variant of the "best" LSTM models + legacy models tessdata folder.
hi, @Samira_Rahme To fix the “InvalidInputLanguage” error in Tesseract OCR for Arabic, download the ara.traineddataara
I have done this, but the error still persists.
I have done this but the error still persists.
hi, @Samira_Rahme If you’ve added the Arabic language file but still get the error, try these:
Check you put the file in the right tessdata folder (sometimes it needs to be in your user AppData path, not just Program Files).
Make sure you downloaded the real .traineddata
Restart UiPath Studio and your PC after adding the file.
If you still have problems, try other OCR engines like Google OCR for Arabic as a temporary workaround.
These steps usually fix the problem. Let me know if you want more help!
