You also can modify the that.ggt then still can use Thail and other language.
<?xml version="1.0" encoding="UTF-8" ?>
<gtt xmlns="http://www.garmin.com/xmlschemas/GarminTextTranslation/v1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.garmin.com/xmlschemas/GarminTextTranslation/v1 http://www.garmin.com/xmlschemas/GarminTextTranslationv1.xsd" >
<hdr>
<lang>ไทย</lang>
<desc>ไทย</desc>
<type>Primary</type>
<sort>0</sort>
<cpage>874</cpage>
<pnum>006-D0851-65</pnum>
<ver>2.20</ver>
<maplang>Japanese</maplang>------ add this line http://www.garmin.com/xmlschemas/GarminTextTranslationv1.xsd">
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