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Archived - Mac OS X 10.5: Changes in Thai user dictionaries from Mac OS X 10.4 and earlier

There have been changes in the way Thai user dictionaries are handled between Mac OS X 10.5 and Mac OS X 10.4 or earlier.

Mac OS X 10.5 comes with a built-in dictionary that it uses to find breaks between Thai words; however, for those who use words that are not in the built-in dictionary (for example, specialized vocabulary), the user dictionary facility allows them to supply their own word list to supplement the one built into the system.

In Mac OS X 10.5's built in dictionary functions, if you want the ability to add your own specialized Thai vocabulary, please follow these steps.

This article has been archived and is no longer updated by Apple.

In Mac OS X 10.4.x or earlier, Thai user dictionaries are plain text files that can be stored in ~/Library/Dictionaries, /Library/Dictionaries, and /Network/Library/Dictionaries. The Thai user dictionary files needed to have the extension ".thaidict", and the file encoding could be one of the following:

  • UTF-8 with UTF-8 BOM
  • Native-endian UTF-16 without a BOM

The file format is one word per line, with the word terminating at white space or a line end. Lines that begin with white space are treated as comments.

In Mac OS X 10.5 and later, Thai user dictionaries are handled differently:

  • The file name must end in "-Thai.txt". Existing dictionaries that end in ".thaidict" must be renamed or they are ignored. For example, "MyDict.thaidict" should be changed to "MyDict-Thai.txt".
  • The set of file encodings accepted is now:
    • Any form of Unicode with a BOM (UTF-8, UTF-16, either endian, or UTF-32, either endian)
    • Native endian UTF-16 without a BOM

Note: TextEdit will not save UTF-8 files with a BOM, so if you are using TextEdit, save the file as UTF-16.

The locations for dictionaries, and the format of the file itself, are unchanged in Mac OS X 10.5.

Additional Information

For more about the BOM (Byte Order Mark), see this website.

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Last Modified: Apr 20, 2012
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  • Last Modified: Apr 20, 2012
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