Expand Mac’s Dictionary App by Adding Additional Languages

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As a writer, one of the most important applications I use in Mac is Dictionary (Applications √ʂĆ‚Äô Dictionary.app). And, as the citizen of a country where English is a foreign language, I always wish to be able to add my own language to the Dictionary so I can quickly and easily translate between the languages.

“Be careful of what you wish, it may come true.”¬Ě That statement is wise indeed. Especially when you wish upon a search engine named Google. I found out that adding other languages to Apple Dictionary is a snap.

Activating Other Built In Dictionaries on your Mac

First and foremost, let’s explore the Dictionary.app before we go too far. It turns out that Dictionary in Leopard already comes with six built in dictionaries plus access to Wikipedia as online reference.
Wait a minute, six? Most people thought there are only three: New Oxford American Dictionary, Oxford American Writer’s Thesaurus, and Apple Dictionary.

But if you go to Dictionary’s Preferences (Dictionary √ʂĆ‚Äô Preferences or simply hit the Command + Comma button), you will have checklist options to activate another three: Japanese, Japanese-English, and Japanese Synonyms. (As to why Apple add built in Japanese dictionaries to Dictionary, you have to ask Apple directly.)

Another less-known feature that also can be activated here is Wikipedia search on another non-English language. Just select the Wikipedia from the list, and then look at the option panel that will show up below it. There are several choices of languages to be chosen by giving tick to the box, but user can add one more language from the drop down lists.

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After closing the Preferences window and restarting the Dictionary, you can see the full list of new active dictionaries.

Adding External Dictionaries

The first logical step to add more dictionaries is to search for ready-made “.dict”¬Ě file. You can accomplish this by going to download sites or directly to google and seach “Apple Dictionary plugin”¬Ě and/or “.dict”¬Ě. There are several dictionaries available such as OpenThesaurus German Dictionary Plugin and Thai-English translation dictionary.

But you can go further by converting other ready-made dictionary format files and translate them into Apple Dictionary’s format. The steps are:

First: acquire the dictionaries

    1. Go to StarDict and choose one or more of the many available dictionaries.

    2. You can also go to the StarDict online dictionary.

    3. Choose the source and destination language.

    4. A link or links will show up and when you click on one of them, a pop up window will appear with the download link of the dictionary.

    5. Choose as many or as little dictionaries as you need.

Second: Convert the dictionaries

To convert the dictionaries that we’ve downloaded into something that could be opened by Apple Dictionary App, we need DictUnifier.

    1. Download the installer and run it.

    2. Choose (one of) the dictionary file(s) that you’ve downloaded.

    3. Click “Convert”¬Ě.

    4. The conversion process will take from about several seconds to a few minutes.

    5. After finish converting, the converted dictionary will automatically exported to Apple Dictionary, and the Dictionary app will be opened.

Simple enough, but please note that some users reported that DictUnifier can not convert several StarDict’s dictionary. If this is the case, just remember to put the same name in the Dictionary Name and Dictionary ID fields.

Finally, you can learn more about Apple Dictionary and how to build your own dictionary by going to Apple’s Dictionary Services Programming Guide.

Do you have other favorite dictionary application? Share using the comment below.

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18 Comments - Write a Comment


Pedro Cassian

Can√ā¬īt seem to find a spanish .dict on stardict, and the persian one downloaded in .rpm which could not be converted in dictunifier.



I’m also looking for a Spanish one! It’s ridiculous: such an important and widely used language and its dictionary (.dict file) is nowhere to be found. HELP!!!


Jeffry Thurana

This is the best that I could find:

Maybe other can help?



Thank you Jeffry but I’m looking for a .dict file in order to add it to the Apple Dictionary, or at the very least one that doesn’t cost $25 which is what the Apimac one costs.

Hopefully someone will find a better option…



I’ve been searching for a spanish.dict dictionary for over a year now, and haven’t managed to find one. This really sucks. I’m stuck to using the rae widget dictionary, but I have to depend on the internet for that.



One can also browse available StarDict dictionaries on (sourceforge.net/project/showfiles.php?group_id=80679) their SourceForge repository… Just search after *.tar.bz2 files…


Thanks. I actually meant Spanish definitions!!! StarDict has several very useful bilingual dictionaries involving Spanish, as well as a couple of Spanish Grammar dictionaries. But an open source Spanish definitions dictionary is needed as well.



I went thru the full routine, but when I tried to make DictUnifier put quick_italian-english into my dictionary, nothing happened [DictUnifier reports “script / not supported
script / not supported”]. BTW, when I downloaded the .tar file and unstuffed it, DU wouldn’t allow me to choose the files generated, but following the imagine in the instructions, I pointed DU at the .tar file, and viola, it seemed to go into the .tar file for what it lists as “quick_italian-english” for “Dictionary” and for Dictionary ID. Needless to say, I’m screwing up something. Suggestions?


Samuel WÃ¥hlstedt

I have the real academia espa√ɬĪola (Rae) in a dict format for debian if somone knows how to convert it to stardict i would be more than happy to share it..

also put up a file on piratebay with 150 stardict lexicons



just put in mediafire.com and I’ll be glad to give it a try

samuel WÃ¥hlstedt

@k here is my mail samuel.wahl@gmail.com . send a message and i mail you the file(s)



thanks anyway. i’ve searched this method and many of them proved it’s useful .

however, after converted the files successfully (.tar.bz2), i have not seen anything in the dictionary, as well as in the dictionary file (/library/dictionaries). i have no idea what happened.

any solutions?



The whole of this so-called method to add a dictionary DOES NOT work at all.

It opens Dictionary with the names of the dictionaries in it, but they do not work “Format not supported” is all that you get for any search word you try.

So please don’t waist your time !!



I would like to grab all the words I’ve made my dictionary learn (I’m a social scientist, so we have loads of silly long jargon words, and we make up more all the time). Once grabbed, I’d like to then import them into the dictionaries on the three other macs I use regularly… Any ideas?



PERFECT!!! Got the file from stardict.org and converted it.. It was very easy and IT WORKED!!! THANK YOU!!!!!!!


Christopher Honey

All You gotta Do Is deselect the “script” checkbox!!!!!



RE: 5. After finish converting, the converted dictionary will automatically exported to Apple Dictionary, and the Dictionary app will be opened.
Simple enough, but please note that some users reported that DictUnifier can not convert several StarDict’s dictionary. If this is the case, just remember to put the same name in the Dictionary Name and Dictionary ID fields.

And in some cases, even that doesn’t work. I just spent over three fruitless hours trying to add the stardict Webster’s 1913 dictionary to my Mac. Thanks for your efforts, though.


michael dematties

This no longer works. Stardict has chnaged its interface

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