The automatic translation service DeepL provided by DeepL Corporation is reputed for its high translation accuracy.
Human Science is also paying attention to DeepL, and the following article explains the quality and implementation methods.
In previous articles, we found that DeepL's quality is high in business emails and medical translations.
How Accurate Are DeepL Translations? Comparison with Google and Microsoft for Business Emails
How to implement DeepL automatic translation service in your business?
This article refers to "DeepL Privacy Policy" and explains DeepL's confidentiality and security. It refers to the latest version updated in April 2021 at the time of writing this article.
Table of Contents
2. Benefits and Considerations of Using Machine Translation
1. What is DeepL Translation?
1-1. Machine translation services became available in Japan from 2020
DeepL Translation is a machine translation service developed by DeepL, a company based in Germany, in 2017. In 2020, Japanese was added to the supported languages, leading to its widespread use in Japan. The company's predecessor, Linguee, previously offered an online dictionary service. Utilizing high-quality data from the past, DeepL Translation is regarded as providing natural and highly accurate translations compared to other machine translation services.
1-2. Translatable Languages
DeepL translation supports 26 languages as of March 2023. It covers languages from major regions around the world, including Western countries, making it sufficient for general business scenarios. Additionally, from 2020 to 2021, 13 new languages, including Greek and Swedish, were added alongside Japanese and Chinese, enhancing convenience with the increase in the number of supported languages.
2. Benefits and Considerations of Using Machine Translation
Here, we will introduce the benefits and considerations of using machine translation.
2-1. Benefits of Using Machine Translation in Business
・Cost Reduction
It is possible to reduce costs because there is no need to outsource translation. Recently, many companies offer machine translation services for free, which leads to a reduction in human costs. Additionally, if you desire higher accuracy translations or more comprehensive services than what is offered in the free version, opting for a paid version may be one of the choices.
・Translation can be done immediately as needed
Machine translation is also noted for its speed compared to human translation. While a human translator can handle approximately 1,500 to 2,500 words a day, machine translation can be completed in a few seconds to a few tens of seconds. The results of the translation can be checked immediately, making it useful for translating urgent documents.
2-2. Points to Note About Machine Translation
・Clarify the subject of the sentence before translating
When translating from Japanese to a foreign language, it is necessary to clarify the subject of the original sentence before proceeding with the translation. Compared to foreign languages, Japanese often conveys meaning without explicitly stating the subject. On the other hand, translating into a foreign language without clarifying the subject increases the risk of altering the meaning of the sentence. To reduce mistranslations and correction time, let's clarify the subject before translating.
・Check if the security is robust
Depending on the service, free machine translation may not have adequate security. You must be cautious as the data of the translated text may remain on the service provider's server, and there is a risk of data leakage. As a preventive measure, switching to a paid version of the machine translation you are using could be an option. When selecting machine translation for business use, carefully consider which services have high confidentiality.
3. DeepL Security
It is important to consider security aspects when implementing.
There are many automatic translation services available for free on the internet, but most free services do not guarantee confidentiality. DeepL is no exception.
First, there are two types of services offered by DeepL.
There is the following description about this DeepL translation. (Our company's summary)
"3. Text and Translation – DeepL Translation (Free Version)
Please enter only the text you wish to transfer to our server when using the translation service. This text submission is necessary for us to provide you with translation and services. We will process your text, documents you upload, and their translations for a limited period for the training and improvement of our neural networks and translation algorithms.
If you make modifications to the translation proposed by our company, these modifications will also be transferred to our server to verify their accuracy and update the translated text to reflect your changes as necessary.
Additionally, your modifications will be stored for a certain period for the training and improvement of our translation algorithms.<br/> Please note that our translation services cannot be used for any text containing personal information.
It is stated that the original text and the translated text you entered will be reused by DeepL. It becomes clear that using DeepL translation when translating business documents that contain confidential information poses significant issues.
On the other hand, there is the following description about DeepL Pro. (Our company's summary)
"4. Text and Translation – DeepL Pro
When using DeepL Pro, the text or documents you submit are not stored permanently and are only temporarily saved to the extent necessary for creating and sending the translation. After you receive the translated text, all submitted text and documents along with their translations will be deleted. If you use DeepL Pro, your text will not be used to improve the quality of our services. For more details, please refer to the terms of use for DeepL Pro.
Please note that the use of DeepL Pro for texts containing any type of personal data is only permitted if you have entered into a data processing agreement with us (see Section 8.1.3 of the DeepL Pro Terms of Use).
Additionally, there is the following description regarding security. (Our company's summary)
"14. Data Security
Your connection to our website and our app is protected by encryption technology that complies with the latest standards. The level of protection also depends on the encryption supported by your internet browser or mobile device. You can determine whether individual pages of our website are encrypted and transmitted by looking for a closed lock or key symbol in your browser's status bar. Additionally, we implement appropriate technical and organizational security measures to protect your data from accidental or intentional manipulation, partial or total loss, destruction by third parties, or unauthorized access. Our security measures are continuously improved in line with technological developments."
Communication is encrypted, ensuring confidentiality.
By using DeepL Pro, as stated in "4. Text and Translation - DeepL Pro" that "after you receive the translated text, all text and documents you sent along with their translations will be deleted," confidentiality is maintained both in the communication path and on the server.
Regarding the privacy policy of DeepL Pro, DeepL has also prepared a separate page on the "EU Data Protection Regulation" (https://www.deepl.com/pro-privacy_info.html).
"With DeepL Pro, text is stored only in random access memory (RAM) and not in persistent storage. ... Text will not be used for training machine learning models."
As a reiteration of DeepL's privacy policy, it states that by using DeepL Pro, the input text and translated text are not saved or reused.
In other words, when translating business documents that contain confidential information, the use of DeepL Pro is essential.
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Is Automatic Translation Security
Okay?

4. How to use DeepL Pro?
We will either contract with DeepL and DeepL Pro, or implement an automatic translation tool integrated with DeepL Pro.
With the AI-powered translation software "MTrans for Office" integrated with DeepL, you can utilize DeepL without the risk of information leakage due to API connections.
MTrans for Office allows you to translate Microsoft Office products (Word, Excel, PowerPoint, Outlook) with one click, leading to a reduction in man-hours.
How about trying our quality and usability with a 14-day free trial?
Translate Office products with the easy translation software MTrans for Office
Customers who are already using translation assistance (CAT) tools such as Memsource and Trados can immediately use "DeepL Pro" by contracting our MTrans for Memsource or MTrans for Trados.
What is MTrans for Memsource?
https://www.science.co.jp/nmt/service/memsource.html
What is MTrans for Trados?
https://www.science.co.jp/nmt/service/nmt.html
We assist with the review of translation operations and the implementation of translation support tools. If you are considering introducing DeepL and improving your translation workflow, please feel free to contact us.
MTrans for Office 14-day free trial
MTrans for Office is a plugin for Microsoft Office products, such as Outlook, that provides one-click translations. It currently supports the translation engines DeepL and Google, and even features integration with ChatGPT.
MTrans has an intuitive interface that can be used immediately, without any explanation. As long as there's an internet connection, your staff can easily use MTrans to translate the text of their Office products from anywhere in the country or abroad.
And thanks to the transcription, rewriting, summarization, proofreading, and dictionary functions powered by ChatGPT, it's more convenient than ever.

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How Accurate Are DeepL Translations? Comparison with Google and Microsoft for Business Emails
How to Implement DeepL Automatic Translation Services in Your Business