Question about support of multiple languages by installer (after modification)

We are currently developing the plug-in of Adobe Illustrator CS5. 

I have a question on how to support multiple languages by that plug-in. 

I want to specify a  path according to a language of Ai and then install the swatch file when installing the plug-in(Extension) by Extension Manager.

However, the swatch file cannot be placed in a desired path.  

The folder of swatch libraries to which Ai refers difffers from language to language, so I want to place the swatch file only in an appropriate  path according to a language of Ai...

    Japanese version of Ai    : [Ai installation path]/Presets/ja_JP/スウォッチ

    English version of Ai    : [Ai installation path]/Presets/en_US/swatches

*In the case that the plug-in is installed into Japanese version of Ai, the expected result is that the swatch file is placed only in "[Ai installation path]/Presets/ja_JP/スウォッチ.

As a way to place the swatch file according to a language of Ai, I described the following contents in MXI file(project.mxi) and then installed the plug-in.  

    URL that I referenced  : http://help.adobe.com/en_US/extensionmanager/cs/using/packaging_extens ion.pdf

--The contents of MXI file--

<macromedia-extension  name="Extension Name"

name_resid="name_ID"  version="1.0.0" ismultilingual="true" >

          -<omitted>-

<files xml:lang="en_US">

<file source="en_US/test.ai" destination="$presets/en_US/swatches"/>

</files>

<files xml:lang="ja_JP">

<file source="ja_JP/test.ai" destination="$presets/ja_JP/スウォッチ"/>

</files>

<files xml:lang="it_IT">

<file source="it_IT/test.ai" destination="$presets/it_IT/swatches"/>

</files>

-----------------------

When I installed the plug-in by the installer created by using the MXI file above, the swatch file(test.ai) was placed not in "$presets/ja_JP/スウォッチ" but in "$presets/en_US/swatches".

Is there anything wrong with the MXI file above?

Also, is there any way to place the swatch file in a desired path according to a language of Ai other than this way.   

If someone knows it, please let me know. 

[Implementation environment]

OS：

Windows7 Ultimate 32bit(Japanese version)

Software and plug-in:

Adobe IllustratorCS5(Japanese version)

Adobe ExtensionManagerCS5(Japanese version)

Adobe FlashBuilder4.6

Adobe ExtensionBuilder2.0