Hello I mean copying the tags with formatting information once as the script starts up.
Then you have to run the script from the script menu and copy the tags <0/> thru <9/> with the formatting up front, run the script, until you have “recorded” the tags, then the script enters production mode
After that, you run the script from quicksilver and paste it in, and hopefully that will work.
I have used this with bold text in TextEdit, and it retains the bold formatting, the problem with the script above was that I coerced the clipboard to the datatype text, I have now changed that to a record, which then should as I understand it, adapt to the formatting already in the text in this special case. So the quick fix, is to try the script above, edited with my new understanding.
If that doesn’t work, try the script below. 
property scriptTitle : "TagInserter"
property hasRecorded : false
property tags : {missing value, missing value, missing value, missing value, missing value, missing value, missing value, missing value, missing value, missing value}
if not hasRecorded then
set foundmissing to false
set i to 0
repeat with atag in tags
if contents of atag is missing value then
set foundmissing to true
try
display dialog "Tag nr " & i & " will be inserted into the script if you hit OK" with title scriptTitle default button 2 cancel button 1
on error
error number -128
end try
set contents of atag to (the clipboard as record)
exit repeat
else
set i to i + 1
end if
end repeat
if foundmissing = true and i = 9 then
set my hasRecorded to true
return 0
else
return 0
end if
end if
if hasRecorded is true then
set tagl to {{leadingnumber(0) & "<0/>"}, {leadingnumber(1) & "<1/>"}, {leadingnumber(2) & "<2/>"}, {leadingnumber(3) & "<3/>"}, {leadingnumber(4) & "<4/>"}, {leadingnumber(5) & "<5/>"}, {leadingnumber(6) & "<6/>"}, {leadingnumber(7) & "<7/>"}, {leadingnumber(8) & "<8/>"}, {leadingnumber(9) & "<9/>"}}
set res to choosesomething("Choose tag to insert", tagl, item 1 of tagl)
if res = false then return
set the clipboard to item (((characters 1 thru 2 of (res as text)) as text as integer) + 1) of tags
tell application "System Events" to tell application process "OmegaT"
set its frontmost to true
-- activate
keystroke "v" using {command down}
end tell
end if
on leadingnumber(n)
return text 1 thru 3 of (n & " " as text)
end leadingnumber
on choosesomething(aPrompt, listOfSomething, defaultSomething)
local theChoice
tell application "SystemUIServer"
activate
set theChoice to choose from list listOfSomething with prompt aPrompt with title my scriptTitle default items defaultSomething without multiple selections allowed and empty selection allowed
end tell
return theChoice
end choosesomething
