Lessons from Building a Translator App That Beats Google Translate and DeepL
Published on: 2025-07-23 03:08:26
How It Started
Recently, I made a new app called Kintoun. It’s a document translator that delivers very high quality translations and keeps the original layout almost perfectly.
At first, I didn’t expect much. But after comparing it with Google Translate and DeepL, I was surprised to see that my app actually performs better in many cases.
In this post, I want to share what I’ve learned while building it. Writing helps me organize my thoughts, and maybe some of this will be useful if you’re working on your own project too.
Lesson #1. Surprise: My app is actually better than Google Translate and DeepL
Let me show you some examples.
Document #1: Original
This is a Word document from Microsoft:
Download this file (docx)
Document #1: Google Translate Result
I translated it into Japanese using Google Translate:
Download this file (docx)
Google Translate couldn’t handle it well. The text wasn’t translated, and the layout and fonts got messed up. I tried with different documents an
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