How to Set OCR Languages and Correction on iPhone

TL;DR

PDFExtract lets you adjust OCR languages, language detection, and correction settings, so scanned pages in the language (or languages) you actually work with come out far more accurately.

Steps

In PDFExtract, open the OCR settings.
Select the OCR language(s) your document uses.
Toggle language detection on or set the language explicitly.
Adjust correction settings to refine the output.
Run OCR and preview the improved result.

Why it works this way

OCR accuracy lives or dies on knowing the language — the same shapes mean different characters across scripts. Letting you set the OCR language, lean on detection, and tune correction means a French paper, a Chinese scan, or a mixed-language report each come out as clean as possible, instead of a generic best-guess.

Tips & edge cases

Set the language explicitly for single-language documents — it beats guessing.
Detection helps with mixed or unknown-language scans.
Correction trims the manual cleanup afterward.

FAQ

Can I OCR non-English documents? Yes. Choose the OCR language(s) that match your document for accurate recognition.

What does language detection do? It helps identify the language automatically; you can also set it explicitly for best results.

Can I clean up OCR mistakes? Correction settings help refine the recognized text so the output needs less manual fixing.